# Number Series – Questions & Answers

**Number Series Questions and Answers is about the Missing numbers in a series that you can expect for Competitive Examinations. Here you can find out practice problems from the topic Missing Number Series.**

**Number Series – Logical Reasoning Questions and AnswersMissing Number Series for Competitive Exams**

**Find the missing number: 32, 48, 72, 108, ——**

Answer: 162

Explanation: 32 x 3/2 = 48

48 x 3/2 = 72

72 x 3/2 = 108

108 x 3/2 = 162**Find the missing number: 0.5, 1.5, 4.5, 13.5, ——-**

Answer: 40.5

Explanation: 0.5 x 3 = 1.5

1.5 x 3 = 4.5

4.5 x 3 = 13.5

13.5 x 3 = 40.5**Find the missing number: 3, 9, 27, 81, ——–**

Answer: 243

Explanation: 3 x 3 = 9, 9 x 3 = 27, 27 x 3 = 81, 81 x 3 = 243**Find the missing number: 4, 9, 13, 22, 35, ——**

Answer: 57

Explanation: 4 + 9 = 13, 13 + 9 = 22, 22 + 13 = 35, 35 + 22 = 57**Find the missing number: 4, 25, 64, ——**

Answer: 121

Explanation: Square of the numbers 2, 5, 8, 11 ———–**Find the missing number: 199, 195, 186, 170, ——-**

Answer: 145

Explanation: 199 – 195 = 4, 195 – 186 = 9, 186 – 170 = 16, 170 – 25 = 145**Find the missing number: 3, 12, 24, 96, 192, ——**

Answer: 768

Explanation: 3 x 4 = 12, 12 x 2 = 24, 24 x 4 = 96, 96 x 2 = 192, 192 x 4 = 768

Multiplication with 4, 2, 4, 2, 4 ———————–**Find the missing number: 2, 7, 3, 26, 4, ——-**

Answer: 63

Explanation: Consider two series 2, 3, 4, ———— and 7, 26, ———

Find cube of 2, 3, 4 ———- and subtract 1 from each.

i.e. Cube of 2 = 8, 8 – 1 = 7.

Cube of 3 = 27, 27 -1 = 26

Cube of 4 = 64, 64 – 1 = 63**Find the missing number: 1, 3, 7, 15, ————**

Answer: 31

Explanation: 1 + 2 = 3, 3 + 4 = 7, 7 + 8 = 15, 15 + 16 = 31**Find the missing number: 5, 9, 4, 8, 3, 7, ———**

Answer: 2

Explanation: Consider two series 5, 4, 3, ———- and 9, 8, 7, ————-

Subtract 1 from each number, we get 5 – 1 = 4, 4 – 1 = 3, 3 – 1 = 2**Find the missing number: 2, 5, 9, 19, 37, ———**

Answer: 75

Explanation: 2 x 2 + 1= 5

5 x 2 – 1 = 10 – 1 = 9

9 x 2 + 1 = 18 + 1 = 19

19 x 2 – 1 = 38 – 1 = 37

37 x 2 + 1 = 74 + 1 = 75**Find the missing number: 7, 12, 19, ————-**

Answer: 28

Explanation: 7 + 5 = 12, 12 + 7 = 19, 19 + 9 = 28

Increased by 5, 7, 9, ————-**Find the missing number: 3, 12, 30, 66, ———–**

Answer: 138

Explanation: 3 + 9 = 12, 12 + 18 = 30, 30 + 36 = 66**Find the missing number: 16, 33, 56, 85, ——**

Answer: 120

Explanation: 5 + 11 = 16, 16 + 17 = 33, 33 + 23 = 56, 56 + 29 = 85, 85 + 35 = 120**Find the missing number: 11, 19, 35, 59, ———-**

Answer: 91

Explanation: Add 8, 16, 24, 32 —————

11 + 8 = 19, 19 + 16 = 35, 35 + 24 = 59, 59 + 32 = 91