All questions of Change to Number & Alphabetical Series for RRB NTPC/ASM/CA/TA Exam

In this following questions, various terms of the letter series are given with one term missing as shown by (?). Choose the missing term out of the given alternative.
Z, U, Q, ?, L
  • a)
    I                               
  • b)
    K                       
  • c)
    M                                                                      
  • d)
    N   
Correct answer is option 'D'. Can you explain this answer?

Given series: Z, U, Q, ?, L

To find: Missing term in the series

Observations:

- The series is a combination of letters in reverse alphabetical order.
- The letters are placed at an interval of 4 positions from each other.

Method:

- We can find the missing term in the series by following the same pattern.
- Starting from L, we need to add 4 positions to it to get the next term.
- We repeat the process until we get the missing term.

Calculation:

- Starting from L, adding 4 positions, we get H.
- Adding 4 positions to H, we get D.

Therefore, the missing term in the series is D.

Hence, the correct answer is option (d) D.

In this following questions, various terms of the letter series are given with one term missing as shown by (?). Choose the missing term out of the given alternative.
U, O, I,  ?, A
  • a)
    E                                                              
  • b)
    C                       
  • c)
    S                                                        
  • d)
    G   
Correct answer is option 'A'. Can you explain this answer?

The given letter series is U, O, I, ?, A. We need to find the missing term.

Pattern:
When we look at the given series, we can observe the following pattern:
- The series is a combination of vowels and consonants.
- The vowels are placed alternatively in descending order of their alphabetical position.
- The consonants are placed alternatively in ascending order of their alphabetical position.

Using this pattern, we can find the missing term.

Solution:
- The first vowel in the series is U, which is the 21st letter of the English alphabet.
- The next vowel should be placed two positions before U in the alphabet.
- Therefore, the next vowel should be S, which is the 19th letter of the alphabet.
- The first consonant in the series is O, which is the 15th letter of the alphabet.
- The next consonant should be placed two positions after O in the alphabet.
- Therefore, the next consonant should be Q, which is the 17th letter of the alphabet.
- The next vowel should be placed two positions before S in the alphabet.
- Therefore, the missing term should be E, which is the 5th letter of the alphabet.
- The last letter in the series is A, which is the 1st letter of the alphabet.

Therefore, the missing term in the series is E, which is option (a).

Which is the third number to the left of the number which is exactly in the middle of the following sequence of numbers?      
1 2 3 4 5 6 7 8 9 2 4 6 8 9 7 5 3 1 9 8 7 6 5 4 3 2 1     
  • a)
    3                                               
  • b)
    4             
  • c)
    5                                               
  • d)
    6     
Correct answer is option 'B'. Can you explain this answer?

The correct option is B 4
In the given sequence 1 2 3 4 5 6 7 8 9 2 4 6 8 9 7 5 3 1 9 8 7 6 5 4 3 2 1, the number of digits given are 27.
Therefore, the middle of the sequence will be the 14th digit as there will be 13 digits on each side of this number. Therefore, the 14th digit is 9.
The third number to the left is 4.
Answer is Option B

In this questions, a number series is given with one term missing. Choose the correct alternative that will continue the same pattern and fill in the black spaces.
Q.  6, 11, 21, 36, 56, (___)
  • a)
    42                            
  • b)
    51                      
  • c)
    81             
  • d)
    91               
Correct answer is option 'C'. Can you explain this answer?

Hiral Kapoor answered
Pattern Analysis:
To find the missing term in the given number series, we need to analyze the pattern followed by the given sequence. Let's break down the series and observe the differences between consecutive terms:

6, 11, 21, 36, 56, ___

Difference between consecutive terms:
- The difference between the 2nd and 1st terms is 11 - 6 = 5.
- The difference between the 3rd and 2nd terms is 21 - 11 = 10.
- The difference between the 4th and 3rd terms is 36 - 21 = 15.
- The difference between the 5th and 4th terms is 56 - 36 = 20.

Pattern in the differences:
If we observe the differences between consecutive terms, we can see that they are increasing by 5, 10, 15, 20, and so on. This indicates an arithmetic progression (AP) with a common difference of 5.

Finding the missing term:
To find the missing term, we need to continue the pattern by adding the next difference to the last term of the series.

The last term is 56, and the next difference is 20. Adding 20 to 56, we get 76.

Therefore, the missing term in the given number series is 76.

Verification:
Let's verify our answer by checking if the pattern holds for the entire series:

6, 11, 21, 36, 56, 76

- The difference between the 2nd and 1st terms is 11 - 6 = 5.
- The difference between the 3rd and 2nd terms is 21 - 11 = 10.
- The difference between the 4th and 3rd terms is 36 - 21 = 15.
- The difference between the 5th and 4th terms is 56 - 36 = 20.
- The difference between the 6th and 5th terms is 76 - 56 = 20.

The differences between consecutive terms remain consistent throughout the series, confirming that our answer is correct.

Therefore, option 'C' (81) is the correct alternative that continues the same pattern and fills in the blank space.

In the following number sequence, how many such even numbers are there which are exactly divisible by its immediate preceding number but not exactly divisible by its immediate following number?      
4 8 6 7 8 6 7 5 6 3 9 7  6 2 6 7 7 2 8 3 6 9 7 6 8  7     
  • a)
    One                                           
  • b)
    Two           
  • c)
    Three                                         
  • d)
    Four  
Correct answer is option 'D'. Can you explain this answer?

Pankaj Menon answered
Solution:
To find the required even numbers, we need to check the condition that the number should be exactly divisible by its immediate preceding number but not exactly divisible by its immediate following number.

Let's go through the given sequence step by step:

- 4 is not even, so we skip it.
- 8 is even and divisible by its immediate preceding number 4, but it is also divisible by its immediate following number 6. So, we skip it.
- 6 is not even, so we skip it.
- 7 is not even, so we skip it.
- 8 is even and divisible by its immediate preceding number 7, but it is also divisible by its immediate following number 6. So, we skip it.
- 6 is not even, so we skip it.
- 7 is not even, so we skip it.
- 5 is not even, so we skip it.
- 6 is even and divisible by its immediate preceding number 5, but it is not divisible by its immediate following number 3. So, we have one number that satisfies the condition.
- 3 is not even, so we skip it.
- 9 is not even, so we skip it.
- 7 is not even, so we skip it.
- 6 is even and divisible by its immediate preceding number 7, but it is not divisible by its immediate following number 2. So, we have another number that satisfies the condition.
- 2 is even and divisible by its immediate preceding number 6, but it is not divisible by its immediate following number 8. So, we have another number that satisfies the condition.
- 6 is even and divisible by its immediate preceding number 2, but it is not divisible by its immediate following number 7. So, we have another number that satisfies the condition.
- 7 is not even, so we skip it.
- 7 is not even, so we skip it.
- 2 is even and divisible by its immediate preceding number 7, but it is not divisible by its immediate following number 8. So, we have another number that satisfies the condition.
- 8 is even and divisible by its immediate preceding number 2, but it is not divisible by its immediate following number 3. So, we have another number that satisfies the condition.
- 3 is not even, so we skip it.
- 6 is even and divisible by its immediate preceding number 8, but it is not divisible by its immediate following number 9. So, we have another number that satisfies the condition.
- 9 is not even, so we skip it.
- 7 is not even, so we skip it.
- 6 is even and divisible by its immediate preceding number 9, but it is not divisible by its immediate following number 7. So, we have another number that satisfies the condition.
- 8 is even and divisible by its immediate preceding number 6, but it is also divisible by its immediate following number 7. So, we skip it.
- 7 is not even, so we skip it.

Therefore, there are a total of four even numbers in the given sequence that are exactly divisible by their immediate preceding number but not exactly divisible by their immediate following number. Hence, the correct answer is option D.

If the fourth, the fifth, the fourteenth, the fifteenth and the twenty-sixth letters of the English alphabet are so rearranged as to form one meaningful English word taking each letter only once, what will be the middle letter of that word? If more than one such word are formed, your answer should be K and if no such word can be formed your answer would be Y.
  • a)
    N                                
  • b)
    Z
  • c)
    O                                
  • d)
    K
  • e)
    Y
Correct answer is option 'B'. Can you explain this answer?

Rhea malhotra answered
Given information: The fourth, the fifth, the fourteenth, the fifteenth and the twenty-sixth letters of the English alphabet are to be rearranged to form one meaningful English word taking each letter only once.

To find: The middle letter of the word formed.

Approach:

- Identify the letters that need to be rearranged.
- Find all possible combinations of those letters.
- Check if any of those combinations form a meaningful English word.
- If more than one word is formed, the middle letter of each word should be checked.
- If no word is formed, the answer is Y.

Solution:

The letters that need to be rearranged are D, E, N, O, and Y.

All possible combinations of these letters are:

- DENOY
- DENOY
- DEONY
- DEOYN
- DEONY
- DEOYN
- DNYOE
- DNYOE
- DNOYE
- DNOEY
- DNEYO
- DNEOY
- DYNEO
- DYNOE
- DYEON
- DYENO
- DYONE
- DYOEN
- DYOEN
- DOYNE
- DOYEN
- DONYE
- DONEY
- DOENY
- DOEYN
- ODEYN
- ODENY
- ODYEN
- ODYNE
- ONEYD
- ONEDY
- ONYED
- ONYDE
- OYDEN
- OYDNE
- OYEDN
- OYEND
- OYNDE
- OYNED
- YDON
- YDNO
- YEDON
- YEDNO
- YENDO
- YEODN
- YONDE
- YONED
- YONDE
- YOEND
- YODEN
- YODNE
- YOEDN
- YOEND
- YONDE
- YONED

Out of these combinations, only one meaningful English word is formed - "HONEYED".

Therefore, the middle letter of the word "HONEYED" is "Z".

Answer: (b) Z.

In this following questions, various terms of the letter series are given with one term missing as shown by (?). Choose the missing term out of the given alternative.
dfe, jih, mln, ___, vut
  • a)
    oqp                                          
  • b)
    psr                     
  • c)
    sor                                
  • d)
    rsp                                    
Correct answer is option 'C'. Can you explain this answer?

Smita rane answered
The given letter series is formed by alternating between the letters in the English alphabet. The first term 'd' is followed by the fourth letter 'e', then the sixth letter 'f', and so on. Similarly, the second term 'j' is followed by the ninth letter 'i', then the eleventh letter 'h', and so on.

To find the missing term, we need to continue the same pattern of alternating between the letters in the English alphabet. The next letter after 'm' is 'n', so the missing term should be the thirteenth letter after 'n', which is 'r'.

Therefore, the missing term in the given letter series is 'prq', which is option (c).

How many such pairs of letters are there in the word FRIENDSHIP, each of which has as many letters between them in the word as in the English alphabet?
  • a)
    Nil                              
  • b)
    One
  • c)
    Two                            
  • d)
    Three
  • e)
    None of these
Correct answer is option 'D'. Can you explain this answer?

Divisha rane answered
Solution:
To solve this problem, we need to identify pairs of letters in the word FRIENDSHIP that have the same number of letters between them in the word as in the English alphabet. Let's start by listing the English alphabet and the letters in the word FRIENDSHIP:

English Alphabet: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
FRIENDSHIP: F R I E N D S H I P

Now, we need to identify pairs of letters that have the same number of letters between them in the word as in the English alphabet. For example, the pair "F" and "I" have two letters between them in the word FRIENDSHIP (R and E), and two letters between them in the English alphabet (G and H). Therefore, this pair satisfies the condition.

Using this method, we can identify the following pairs:

• F and I (2 letters between them)
• R and U (2 letters between them)
• E and H (4 letters between them)

Therefore, there are three pairs of letters in the word FRIENDSHIP that satisfy the given condition. The correct answer is option D.

In this following questions, various terms of the letter series are given with one term missing as shown by (?). Choose the missing term out of the given alternative.
R, T, ?, B , G ,?
  • a)
    C, B                                          
  • b)
    J, H                    
  • c)
    B, H                                         
  • d)
    W, M                            
Correct answer is option 'D'. Can you explain this answer?

Ayushi patil answered
Given series: Q R M ? F D ?

To find: Missing terms in the series

Solution:
The given series consists of alphabets.

Observations:
- The letters are in descending order of their positions in the English alphabet.
- The difference between consecutive letters is not constant.

The missing letters can be found by analyzing the difference between their positions in the alphabet.

Calculation:
- Position of Q in the alphabet = 17
- Position of R in the alphabet = 18
- Difference = 1
- Position of M in the alphabet = 13
- Position of F in the alphabet = 6
- Difference = 7
- The missing letter between M and F should have a position in the alphabet = 13 - 7 = 6
- The letter with a position of 6 in the alphabet is C
- Position of D in the alphabet = 4
- The missing letter between F and D should have a position in the alphabet = 4 + 7 = 11
- The letter with a position of 11 in the alphabet is K

Therefore, the missing terms in the series are C and K.

Verification:
The series becomes: Q R M C F D K
- The difference between Q and R is 1
- The difference between R and M is 5
- The difference between M and C is 7
- The difference between C and F is 3
- The difference between F and D is 7
- The difference between D and K is 6

Conclusion:
The missing terms in the series are C and K, which are present in option D. Hence, the answer is option D.

Four of the following five groups of letters are alike in some way while one is different. Find out which one is different.
  • a)
    EJO                             
  • b)
    IMQ
  • c)
    KQV                            
  • d)
    LTB
  • e)
    GJM
Correct answer is option 'C'. Can you explain this answer?

Dia Mehta answered
Difference between each alphabet is same in each option,
- EJO     E(5) - J(10) - O(15) Difference - 5
- IMQ      I (9) -  M(13) - Q(17) Difference - 4
- KQV     K(11) - Q(17) - V(21) Difference - 6 and 4
- LTB      L(12) - T(20) - B(2) Difference - 8
- GJM     G(7) - J(13) - M(13) Difference - 3

In this following questions, various terms of the letter series are given with one term missing as shown by (?). Choose the missing term out of the given alternative.
BF, CH, ?, HO, LT
  • a)
    DN                                           
  • b)
    EL                     
  • c)
    EK                                                                     
  • d)
    EM    
Correct answer is option 'C'. Can you explain this answer?

We can look at the first and second letters separately:
  1. First letter pattern (B, C, ?, H, L):
    • B to C: +1 position
    • C to ?: +2 positions
    • H to L: +4 positions
    • The missing letter should be E (C + 2 = E).
  2. Second letter pattern (F, H, ?, O, T):
    • F to H: +2 positions
    • H to ?: +3 positions
    • O to T: +5 positions
    • The missing letter should be K (H + 3 = K).
Thus, the missing term is EK.
The correct answer is C: EK.

In this following questions, various terms of the letter series are given with one term missing as shown by (?). Choose the missing term out of the given alternative.
Z, S, W, O, T, K, Q, G,  ?, ?
  • a)
    N, C                         
  • b)
    N, D                  
  • c)
    O, C                                                  
  • d)
    O, D   
Correct answer is option 'A'. Can you explain this answer?

Ankita iyer answered
The given letter series follows a pattern where every alternate letter is skipped and the remaining letters are written in descending order of their position in the English alphabet.

- The first letter is Z, which is the 26th letter in the English alphabet.
- The second letter is skipped.
- The third letter is W, which is the 23rd letter in the English alphabet.
- The fourth letter is skipped.
- The fifth letter is T, which is the 20th letter in the English alphabet.
- The sixth letter is skipped.
- The seventh letter is Q, which is the 17th letter in the English alphabet.
- The eighth letter is skipped.

To find the missing terms in the series, we need to continue the pattern.

- The ninth letter should be written by skipping the eighth letter and writing the next letter in descending order. The eighth letter is skipped, and the next letter in descending order after Q (17th letter) is N (14th letter).
- The tenth letter should be written by skipping the ninth letter and writing the next letter in descending order. The ninth letter is N, and the next letter in descending order after N (14th letter) is C (3rd letter).

Therefore, the missing terms in the series are N, C. Option A, N, C, is the correct answer.

In this following questions, various terms of the letter series are given with one term missing as shown by (?). Choose the missing term out of the given alternative.
A, B, D, G,?
  • a)
    M                            
  • b)
    L                        
  • c)
    K                                                              
  • d)
    H                                                       
Correct answer is option 'C'. Can you explain this answer?

Ishaan Kumar answered
The given letter series is A, B, D, G,?

The pattern followed in the series is that each subsequent term is the sum of the previous term and the position of the previous term in the alphabet.

- A is the first letter of the alphabet, so its position is 1.
- B is the second letter of the alphabet, so its position is 2.
- D is the fourth letter of the alphabet, so its position is 4.
- G is the seventh letter of the alphabet, so its position is 7.

Therefore, the missing term in the series will be the sum of the previous term and the position of the previous term in the alphabet.

- So, the missing term is H, which is the eighth letter of the alphabet and its position is 8.
- Hence, the correct answer is option C, K.

In each of the following questions, a number /alphabet series is given with one term missing. Choose the correct alternative that will continue the same pattern and replace the question mark in the given series.
Q.​ 
2B, 4C, 8E, 14H, ?
  • a)
    16 K                           
  • b)
    20 I
  • c)
    20 L                           
  • d)
    22 L
  • e)
    None of these
Correct answer is option 'D'. Can you explain this answer?

Arindam Joshi answered
Continuing Alphabet Series

Pattern:
In this series, the pattern followed is that the alphabet is increased by a certain number in each term. The first term is 'B', and in the second term, it is increased by 2 to get 'C'. In the next term, 'C' is increased by 4 to get 'E', and so on.

Explanation:
- In the first term, the alphabet is 'B'.
- In the second term, it is increased by 2 to get 'C'.
- In the third term, 'C' is increased by 4 to get 'E'.
- In the fourth term, 'E' is increased by 6 to get 'H'.
- Therefore, in the fifth term, 'H' should be increased by 8 to get the next alphabet.

Option Analysis:
a) 16 K
- This option does not follow the pattern as the alphabet 'K' is not increased by 8 to get the next alphabet.
b) 20 I
- This option does not follow the pattern as the alphabet 'I' is not increased by 8 to get the next alphabet.
c) 20 L
- This option does not follow the pattern as the alphabet 'L' is increased by 6, which does not fit with the pattern.
d) 22 L
- This option follows the pattern as 'H' is increased by 8 to get 'P'.
e) None of these
- This option is incorrect as option 'D' is the correct answer.

Conclusion:
Therefore, the correct answer is option 'D' - 22 L.

Study the following letters /cods and answer the questions given below:
L z x 2 m s 3 k e n 4 p q r 5 a b c 6 d f g h 7 u v w 8 y t p o 9 I j
Q. 
Four of the following five are alike in a certain way and so form a group. Which one of the following does not belong to that group?
  • a)
    nsr                                            
  • b)
    pjw  
  • c)
    bqf                                      
  • d)
    h6w
Correct answer is option 'B'. Can you explain this answer?

Partho Pillai answered
Explanation:

To solve this question, we need to identify the group among the given options. Let's analyze each option and find the common pattern among them.

a) nsr
The letters in this option are not in sequential order, and they do not follow any specific pattern.

b) pjw
The letters in this option are not in sequential order, and they do not follow any specific pattern.

c) bqf
The letters in this option are not in sequential order, and they do not follow any specific pattern.

d) h6w
The letters in this option are not in sequential order, but there is a pattern. The first letter 'h' is followed by a number '6' and then 'w'. This pattern of a letter followed by a number followed by another letter is consistent with the pattern in the given letters/codes: 'k e n', 'p q r', 'a b c', 'd f g h', 'y t p o', 'I j'. Therefore, option 'd' belongs to the group.

e) 2ms
The letters in this option are not in sequential order, but there is a pattern. The first letter '2' is followed by 'm' and then 's'. This pattern of a number followed by a letter followed by another letter is consistent with the pattern in the given letters/codes: 'k e n', 'p q r', 'a b c', 'd f g h', 'y t p o', 'I j'. Therefore, option 'e' belongs to the group.

Conclusion:

From the given options, option 'b' (pjw) does not belong to the group as it does not follow any specific pattern like the other options.

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