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SSC CGL Model Paper 2

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Question : 9 of 100

Marks: +1, -0

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.

0, 3, 8, ?, 24, 35

15
16
18
9

Solution:

Concept:

The series follows the pattern

n^2 - 1

, where

n

is the position of the term.

Explanation:

Write the positions as

n = 1,2,3,4,5,6

.

Substitute each position into

n^2 - 1

.

For

n=1

:

1^2 - 1 = 0

For

n=2

:

2^2 - 1 = 3

For

n=3

:

3^2 - 1 = 8

For

n=4

:

4^2 - 1 = 15

For

n=5

:

5^2 - 1 = 24

For

n=6

:

6^2 - 1 = 35

The missing term is at the fourth position.

So, the missing number is

15

.

Answer:

15

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