# Simple Arithmetic & Mental Ability/ Model Questions for Competitive examinations.

**Simple Arithmetic & Mental Ability is about some model questions that you can expect for competitive examinations. Here you can find out practice problems for Maths GK.**

**SIMPLE ARITHMETIC & MENTAL ABILITYExpected Questions for Competitive Examinations/ Model Questions.Choose the correct answer from the options given below:**

- Find the odd one out:

A. 25

B. 36

C. 48 - Find 50 – 20 – 9 + 37 + 3?

A. 61

B. 62

C. 63 - 35: 70 = 1: x, then find x?

A. 1

B. 2

C. 3 - If 3a = 9, find 2a + 5?

A. 9

B. 11

C. 13 - Write the next number: 1, 3, 7, 15, ——-

A. 23

B. 29

C. 31 - Find the odd one out:

A. 531

B. 433

C. 207 - The value of 3x – 5 when x = 3 is ————-

A. 1

B. 4

C. 7 - Find the average of 32, 34, 36 and 38?

A. 33

B. 35

C. 37 - Write the successor of 12999?

A. 12998

B. 13000

C. 13002 - Which of the following is not a factor of 32?

A. 1

B. 4

C. 6

**ANSWERS:**

- 48
- 63
- 2
- 11
- 31
- 433
- 4
- 35
- 13000
- 6

**Explanations:**

- 25 & 36 are perfect squares.

48 is not a perfect square. - 50 – 4 x 5 – 9 + 37 + 3= 50 – 20 – 9 + 37 + 3

= 90 – 29 = 61 - 35: 70 = 1: x

x = 70/35 = 2 - 3a = 9

a = 9/3 = 3

Now 2a + 5 = 2 x 3 + 5 = 6 + 5 = 11 - 1 + 2 = 3

3 + 4 = 7

7 + 8 = 15

15 + 16 = 31 - 531 & 207 are divisible by 3 and sum of digits is 9.
- 3x – 5 = 3 x 3 – 5 = 9 – 5 = 4
- Average = (32 + 34 + 36 + 38)/ 4 = 140/ 4 = 35
- Successor of 12999 is 12999 + 1 = 13000
- Factors of 32 are 1, 2, 4, 8, 16, and 32.