Number Series Practice Question LR Notes | EduRev

LR : Number Series Practice Question LR Notes | EduRev

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Easy

These questions are targeted to improve your knowledge on basic concepts, though easy questions are rare in CAT these are extremely important for conceptual understanding at foundation level

Question 1:Find out the missing term: 

256, 64, 16, 4, ?

Example 1: Find out the missing term:
0, 3, 8, 15, 24, 35, 48?

(a) 53
(b) 63
(c) 80
(d) None of these
Ans. (b) 
Solution: The series is following the pattern +3, +5, +7, +9, +11, +13 and hence the next term should be 48 + 15 = 63. Answer is option (b).


Example 2: Find out the missing term:
Obtain the missing term B, G, K, ?
(a) N
(b) P
(c) M
(d) L

Ans. (a)
Solution: The series is defined by the 2nd , 7th , 11th term of the alphabet. Hence, the next term would be the 14th term i.e., N. Option (a) is the correct answer 


Example 3: Find out the missing term:
?, 425, 600, 825, 1100, 1425
(a) 225
(b) 300
(c) 250
(d) None of these

Ans. (b)
Solution: The series follows a pattern of +175, +225, +275, +325. Hence, the first term should be 300, so the answer is option (b).

Question 2:Find out the missing term: 

7,15, 27, ?, 63

Question 3:Find out the missing term:

1, 121, 12321, 1234321, ___?


Question 4:Find out the missing term:
0.005, 0.05, ?, 5

Question 5:Find out the missing term:

31, 32, 36, 45, ?

Question 6:Find out the missing term:

1, 5, 2, 25, 3, 125, 4, ?


Question 7:Find out the missing term:83, 82, 80, 77, ?


Medium

Almost 70% of questions in CAT are of Medium based questions. Though the conceptually they seem easier, trick is to solve the calculations faster & we curated problems for you to help you do problems easier.


Example 1: Find out the missing term:
7: 45, 40, 35, _____ which term will be the first negative term of the series?
(a) 10th term
(b) 11th term
(c) 12th term
(d) 13th term
Ans. (b)
Solution: The first negative term will be –5 (11th term). Hence, option (b) is the answer.


Example 2: Find out the missing term:
1, 3, 2, 5, 3, 7, 4, 9, 5, 11, 6, ?
(a) 10
(b) 11
(c) 13
(d) 9
Ans.
(c)
Solution: Two series are intermixed. 1, 2, 3, 4, 5, 6 and 3, 5, 7, 9, 11. Hence, the next term should be 13. So option (c) is the answer.


Example 3: What is the next term in the following series?
ABE, BCF, CDG, DEH, EFI, ______
(a) FGK
(b) FGJ
(c) FGL
(d) None of these

Ans. (b)
Solution: The next term in the series would be FGJ. Hence, option (b) is the answer.

Question 8:Find out the missing term:

1/1, 4/8, 9/27, 16/64, 25/125, ?

Question 9:Find out the missing term:

1, 4, 27, ?

Question 10:What is the next term in the following series?

ZYXWTSRQNMLK


Question 11:What is the next term in the following series?
1, 4, 3, 9, 5, 16, 7, 25, 9, 36, 11, ?

Question 12:Calculate the sum of the series
1 + 1/4 + 1/16 + ______.

Question 13:Calculate the missing term.

625, 125, ?, 5, 1


Hard

Around 25% of these type questions come in CAT - If your target is above 95%ile we recommend you to solve these questions as well.


Direction for Questions ( 1-2) - Study the following information carefully to answer the questions given below: S Q A 5 N % T 7 B 4 # J E $ 2 T D * 1 8 H 3 U @ 9 F W © K
Example 1: How many such consonants are there in the above arrangement, each of which is immediately followed by a vowel but not immediately preceded by a number?

(a) One 
(b) Two 
(c) Three 
(d) More than three
Ans. (a)
Solution: T7 is the only instance of a consonant followed by a number and not preceded by a number. Option (a) is correct.


Example 2: Which of the following is the seventh to the left of the fifteenth from the left end in the above arrangement?
(a) H
(b) B
(c) 1
(d) 7

Ans. (d)
Solution: The fifteenth from the left is ‘2’ while the 7th to the left of 2 is ‘7’ itself. Option (d) is correct.

Question 14:Direction for Questions: Study the following information carefully to answer the questions given below:

S Q A 5 N % T 7 B 4 # J E $ 2 T D * 1 8 H 3 U @ 9 F W © K 

How many such consonants are there in the above arrangement, each of which is either immediately preceded by a vowel or immediately followed by a symbol but not both?


Question 15:The letters skipped between adjacent letters is in the order of 1, 2, 3, 4, ..... Which alternative follows this rule ?

Question 16:Which of the following will come in place of the question mark (?) in the following sequence?

16D7, 18G10, 21KI4, 25P19, ?

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