4. Number System Questions for Competitive Exams

This is the aptitude questions and answers section on "Problems on Numbers" with explanation for various interview, competitive examination and entrance test.

Number System Questions 

1. A number being divided by 52 gives remainder 45. If the number is divided by 13, the remainder will be

(1) 5
(2) 6
(3) 12
(4) 7

2. How many natural numbers divisible by 7 are there between 3 and 200 ?

(1) 27
(2) 28
(3) 29
(4) 30

3. A number when divided by 5 leaves a remainder 3. What is the remainder when the square of the same number is divided by 5 ?

(1) 1
(2) 2
(3) 3
(4) 4

4. How many numbers between 400 and 800 are divisible by 4, 5 and 6 ?

(1) 7
(2) 8
(3) 9
(4) 10

5. When n is divided by 6, the  remainder   is 4. When 2n is divided by 6, the remainder is

(1) 2
(2) 0
(3) 4
(4) 1

6. The smallest no that must be added to 803642 in order to obtain a multiple of 11 is

(1) 1
(2) 4
(3) 7
(4) 9

7. The product of all the prime numbers between 80 and 90 is

(1) 83
(2) 89
(3) 7387
(4) 598347

8. One- fourth of a tank holds 135 litres of water. What part of the tank is full if it contains 180 litres of water ?

(1) 2/5
(2) 2/3
(3) 1/3
(4) 1/6

9. Half of 1 percent written as a decimal is

(1) 0.2
(2) 0.02
(3) 0.05
(4) 0.005

10. Find a number, one-seventh of which exceeds its eleventh part by 100.

(1) 1925
(2) 1825
(3) 1540
(4) 1340

Try:-

1-2,       2-2,        3-4,          4-1,       5-1,
 6-3,      7- 3,       8-3,          9-4,       10-1

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