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:
- 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.