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All questions of Ascending and Descending Order for Judiciary Exams Exam

What is the next number in the series 1, 4, 9, 16, ...?
  • a)
    25
  • b)
    20
  • c)
    24
  • d)
    18
Correct answer is option 'A'. Can you explain this answer?

EduRev CLAT answered
The given series is formed by squaring consecutive natural numbers (1, 2, 3, 4, ...). So, the next number in the series is 5^2 = 25.

What is the common difference in the series 3, 8, 13, 18, ...?
  • a)
    4
  • b)
    5
  • c)
    5
  • d)
    2
Correct answer is option 'B'. Can you explain this answer?

Ojasvi Mehta answered
The given series is an arithmetic progression (AP), where each term increases by a constant value known as the common difference. In this case, the common difference is 5 - 3 = 2. So, the correct choice is Option D.

Which type of series is characterized by a common ratio and is of the form a, ar, ar2, ar3, ...?
  • a)
    Geometric progression (GP)
  • b)
    Arithmetic progression (AP)
  • c)
    Odd numbers series
  • d)
    Even numbers series
Correct answer is option 'A'. Can you explain this answer?

A geometric progression (GP) is a series where each term is multiplied successively by a number in order to obtain the next term. The quotient of two consecutive terms is always the same and is known as the common ratio (r). For example, the series 2, 6, 18, 54,... is a geometric progression with a common ratio of 3 (each term is obtained by multiplying the previous term by 3). This is different from an arithmetic progression (AP), where each term is obtained by adding a constant value to the previous term.

What is the first term in the arithmetic progression (AP) with a common difference of 4 and the 7th term equal to 27?
  • a)
    3
  • b)
    5
  • c)
    4
  • d)
    2
Correct answer is option 'A'. Can you explain this answer?

In an arithmetic progression (AP), the n-th term is given by [a + (n - 1)d]. Here, the 7th term is 27, and the common difference (d) is 4. We can find the first term (a) by rearranging the formula: a = 27 - (7 - 1) * 4 = 27 - 6 * 4 = 27 - 24 = 3. So, the correct choice is Option A.

Which series is formed by adding each number to the previous term, such as 17, 22, 32, 47, ...?
  • a)
    Geometric progression (GP)
  • b)
    Fibonacci Series
  • c)
    Odd numbers series
  • d)
    Increasing series
Correct answer is option 'D'. Can you explain this answer?

Adding each number to the previous term is a characteristic of an increasing series. In an increasing series, each term is obtained by adding a constant difference to the previous term. Let's analyze the given series step by step to understand why it belongs to an increasing series.

Step 1: 17
The first term of the series is 17.

Step 2: 17 + 5 = 22
To obtain the second term, we add 5 to the previous term (17).

Step 3: 22 + 10 = 32
To obtain the third term, we add 10 to the previous term (22).

Step 4: 32 + 15 = 47
To obtain the fourth term, we add 15 to the previous term (32).

We can observe that each term is obtained by adding a constant difference to the previous term. In this case, the constant difference is increasing by 5 each time (5, 10, 15). Therefore, the series is an increasing series.

Explanation of Other Options:
a) Geometric Progression (GP): In a geometric progression, each term is obtained by multiplying a constant ratio to the previous term, not by adding a constant difference. Therefore, this series does not follow the pattern of a geometric progression.
b) Fibonacci Series: In a Fibonacci series, each term is obtained by adding the two previous terms, not by adding a constant difference to the previous term. Therefore, this series does not follow the pattern of a Fibonacci series.
c) Odd Numbers Series: In an odd numbers series, each term is an odd number, but the terms are not obtained by adding a constant difference to the previous term. Therefore, this series does not follow the pattern of an odd numbers series.

Conclusion:
The given series, 17, 22, 32, 47, ..., forms an increasing series as each term is obtained by adding a constant difference (5, 10, 15) to the previous term.

What is the next number in the series 1, 1, 2, 3, 5, ...?
  • a)
    8
  • b)
    10
  • c)
    13
  • d)
    7
Correct answer is option 'C'. Can you explain this answer?

Arpita patil answered
To find the next number in the given series, let's analyze the given numbers:

1, 1, 2, 3, 5, ...

The series appears to follow the Fibonacci sequence, where each number is the sum of the two preceding numbers. Let's break it down step by step:

1. First Number: The series starts with 1.
2. Second Number: The second number is also 1.
3. Third Number: To get the third number, we add the first and second numbers, which gives us 1 + 1 = 2.
4. Fourth Number: To find the fourth number, we add the second and third numbers, which gives us 1 + 2 = 3.
5. Fifth Number: To find the fifth number, we add the third and fourth numbers, which gives us 2 + 3 = 5.

Following this pattern, we can find the next number in the series:

6. Sixth Number: To find the sixth number, we add the fourth and fifth numbers, which gives us 3 + 5 = 8.

Hence, the next number in the series is 8.

Therefore, the correct answer is option 'C' (13)

Which series is formed by multiplying each term by a constant value, such as 2, 4, 8, 16, ...?
  • a)
    Geometric progression (GP)
  • b)
    Arithmetic progression (AP)
  • c)
    Odd numbers series
  • d)
    Decreasing series
Correct answer is option 'A'. Can you explain this answer?

The series 2, 4, 8, 16,... is a geometric progression (GP) where each term is obtained by multiplying the previous term by a constant value (in this case, 2). So, the correct choice is Option A.

In which type of series is each term obtained by dividing the previous term by a constant value?
  • a)
    Increasing series
  • b)
    Decreasing series
  • c)
    Geometric progression (GP)
  • d)
    Odd numbers series
Correct answer is option 'C'. Can you explain this answer?

In a geometric progression (GP), each term is obtained by multiplying the previous term by a constant value (common ratio, denoted as 'r'). Therefore, the correct choice is Option C.

Which series is formed by subtracting a number from successive terms, like 100, 97, 92, 85, ...?
  • a)
    Geometric progression (GP)
  • b)
    Decreasing series
  • c)
    Even numbers series
  • d)
    Prime Number Series
Correct answer is option 'B'. Can you explain this answer?

EduRev CLAT answered
The series 100, 97, 92, 85,... is formed by subtracting a number (odd numbers starting from 3) from each successive term. This type of series is known as a decreasing series. So, the correct choice is Option B.

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