# 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 ABILITY
Expected Questions for Competitive Examinations/ Model Questions.
Choose the correct answer from the options given below:

1. Find the odd one out:
A. 25
B. 36
C. 48
2. Find 50 – 20 – 9 + 37 + 3?
A. 61
B. 62
C. 63
3. 35: 70 = 1: x, then find x?
A. 1
B. 2
C. 3
4. If 3a = 9, find 2a + 5?
A. 9
B. 11
C. 13
5. Write the next number: 1, 3, 7, 15, ——-
A. 23
B. 29
C. 31
6. Find the odd one out:
A. 531
B. 433
C. 207
7. The value of 3x – 5 when x = 3 is ————-
A. 1
B. 4
C. 7
8. Find the average of 32, 34, 36 and 38?
A. 33
B. 35
C. 37
9. Write the successor of 12999?
A. 12998
B. 13000
C. 13002
10. Which of the following is not a factor of 32?
A. 1
B. 4
C. 6

1. 48
2. 63
3. 2
4. 11
5. 31
6. 433
7. 4
8. 35
9. 13000
10. 6

Explanations:

1. 25 & 36 are perfect squares.
48 is not a perfect square.
2. 50 – 4 x 5 – 9 + 37 + 3= 50 – 20 – 9 + 37 + 3
= 90 – 29 = 61
3. 35: 70 = 1: x
x = 70/35 = 2
4. 3a = 9
a = 9/3 = 3
Now 2a + 5 = 2 x 3 + 5 = 6 + 5 = 11
5. 1 + 2 = 3
3 + 4 = 7
7 + 8 = 15
15 + 16 = 31
6. 531 & 207 are divisible by 3 and sum of digits is 9.
7. 3x – 5 = 3 x 3 – 5 = 9 – 5 = 4
8. Average = (32 + 34 + 36 + 38)/ 4 = 140/ 4 = 35
9. Successor of 12999 is 12999 + 1 = 13000
10. Factors of 32 are 1, 2, 4, 8, 16, and 32.