## Number Solved Questions For IBPS, SBI and Other Bank Exams - Page 3

**Question 1**

5,15,35,?,105

a. 65

b. 55

c. 45

d. 75

e. 85

**Answer : a. 65**

Solution :

5 + 10 = 15

15 + 20 = 35

35 + 30 = 65

65 + 40 = 105

First term is added with 10, second with 20 and so on. Hence the number in place of question mark is 65.

**Question 2**

10, 15, 45/2, 135/4, ?

a. 405/6

b. 405/8

c. 405/4

d. 270/8

e. 270/4

**Answer :** b. 405/8

Solution :

10 x 3/2 = 15

15 x 3/2 = 45/2

45/2 x 3/2 = 135/4

135/4 x 3/2 = 405/8

Every term is obtained by multiplying the previous term by 3/2. Hence answer is 405/8

**Question 3**

-2,4,-8,16,?

a. -32

b. 32

c. -64

d. 64

e. -24

**Answer :** a. -32

Solution :

-2 x -2 = 4

4 x -2 = -8

-8 x -2 = 16

16 x -2 = -32

Every number is got by multiplying the previous number by -2. Hence -32 is the answer.

**Question 4**

2,3,5,8,?, 21

a. 10

b. 11

c. 15

d. 12

e. 13

**Answer :** e. 13

Solution :

2 + 3 = 5

3 + 5 = 8

5 + 8 = 13

13 + 8 = 21

This is a Fibonacci series, where every number is obtained by adding the previous two numbers. Hence answer is 13.