Problems on Numbers Apitude Excersize Problems

1. 325325 is a six-digit number. It is divisible by:
A.7 only
B.11 only
C.13 only
D.All 7, 11 and 13

Explanation:

2. The difference between the squares of two consecutive odd integers is always divisible by:
A.3
B.6
C.7
D.8

Explanation:

3. In tow-digit number, the digit in the unit’s place is four times the digit in ten»s place and sum of the digits is equal to 10. What is the number?

A. 14
B. 18
C. 20
D. 28

Explanation:

4. Three times the first of three consecutive odd integers is 3 more than twice the third. The third integer is:
A.    9   
B.    11
C.    13   
D.    15

Explanation:

5. The difference between a two-digit number and the number obtained by interchanging the positions of its digits is 36. What is the difference between the two digits of that number?
A.    3   
B.    4
C.    9   
D.    Cannot be determined

Explanation:

6. The sum of the digits of a two-digit number is 15 and the difference between the digits is 3. What is the two-digit number?
A.    69   
B.    78
C.    96   
D.    Cannot be determined

Explanation:

7. A number consists of two digits. If the digits interchange places and the new number is added to the original number, then the resulting number will be divisible by:
A.    3   
B.    5
C.    9   
D.    11

Explanation:

8. In a two-digit, if it is known that its unit's digit exceeds its ten's digit by 2 and that the product of the given number and the sum of its digits is equal to 144, then the number is:
A.    24   
B.    26
C.    42   
D.    46

Explanation:

9. Find a positive number which when increased by 17 is equal to 60 times the reciprocal of the number.
A.    3   
B.    10
C.    17   
D.    20

Explanation:

10. A number consists of 3 digits whose sum is 10. The middle digit is equal to the sum of the other two and the number will be increased by 99 if its digits are reversed. The number is:
A.    145   
B.    253
C.    370   
D.    352

Explanation: