**Number Series Questions & Answers with Explanation – Test Paper 3**

1) Find the missing numbers in the series, 4, 20, 7, 14, 10, 8, 13, _, _.

- 2, 18
- 2, 14
- 2, 16
- 2, 15

**Answer:** 3

**Explanation:**

This is an alternating addition and subtraction series in which 3 is added to each number in the first pattern and 6 is subtracted from each number in the second pattern. Therefore, the next two numbers are 2 (8-6) and 16 (13+3).

2) Find the wrong number in the series, 2, 6, 15, 31, 56, 93.

- 93
- 15
- 31
- 56

**Answer:** 1

**Explanation:**

In this series, the difference between the two consecutive numbers is 4, 9, 16, 25, and 37 (2^{2} + 3^{2} + 4^{2} + 5^{2} + 6^{2}). So, after 25 there should be 36, not 37, and after 56 there should be 92 (56+36) not 93.

3) 12 12, 24 24, 36 36, 48, _, _?

- 48 58
- 48 60
- 48 62
- 48 64

**Answer:** 2

**Explanation:**

In this series, each number repeats itself then increases by 12, so the next two numbers are 48 and 60 (48+12).

4) Find the next two numbers in the series, 52, 50, 48, 44, 42, 40, 36 _, _

- 33, 31
- 34, 32
- 34, 30
- 32, 30

**Answer:** 2

**Explanation:**

This is an alternating subtraction series; 2 is subtracted twice, then 4 is subtracted once and so on. Therefore, the next two numbers are 34 and 32.

5) Find the next two numbers in the series 5, 12, 15, 22, 25, 32, _, _.

- 35, 42
- 39, 42
- 42, 35
- 34, 39

**Answer:** 1

**Explanation:**

This is an alternating addition series that adds 7 then 3 and so on.

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