series completion Model Questions & Answers, Practice Test for ssc mts paper 1 2023

Directions:

In each of these questions, various terms of a series are given with one term missing as shown by (?). Choose the missing term :

Question :1

0, 1, 3, 7, 15, ?, 63

Differences are 20, 21, 22, 23. and so on.

Question :2

336, 210, 120, ?, 24, 6, 0

Note that,

0 = 13 – 1

6 = 23 – 2

24 = 33 – 3

Question :3

3, 12, 27, 48, 75, 108, ?

The numbers are 3 × 12, 3 × 22, 3 × 32, 3 × 42, 3 × 52, 3 × 62, ......

∴ Missing number = 3 × 72 = 3 × 49 = 147

Question :4

24, 6, 18, 9, 36, 9, 24, ? ,

Consider pairs of numbers:

24 : 6, 6 is one-fourth of 24;

18, 9, 9 is half of 18;

36, 9 : 9 is one fourth of 36

Question :5

14, 12, 21, ?, 28, 24, 35, 30

Two sequences of numbers are alternatively arranged.

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