### Aptitude > Numbers > General Questions

Posted:

**Wed Aug 21, 2013 2:20 pm**STB Info, Computer, Mobile Softwares

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Posted: **Wed Aug 21, 2013 2:20 pm**

Posted: **Wed Aug 21, 2013 2:30 pm**

3.

What least number must be added to 1056, so that the sum is completely divisible by 23 ?

A. 2

B. 3

C. 18

D. 21

E. None of these

Answer: Option A

5.

1397 x 1397 = ?

A. 1951609

B. 1981709

C. 18362619

D. 2031719

E. None of these

Answer: Option A

6.

How many of the following numbers are divisible by 132 ?

264, 396, 462, 792, 968, 2178, 5184, 6336

A. 4

B. 5

C. 6

D. 7

Answer: Option A

Explanation:

132 = 4 x 3 x 11

So, if the number divisible by all the three number 4, 3 and 11, then the number is divisible by 132 also.

264 11,3,4 (/)

396 11,3,4 (/)

462 11,3 (X)

792 11,3,4 (/)

968 11,4 (X)

2178 11,3 (X)

5184 3,4 (X)

6336 11,3,4 (/)

Therefore the following numbers are divisible by 132 : 264, 396, 792 and 6336.

Required number of number = 4.

What least number must be added to 1056, so that the sum is completely divisible by 23 ?

A. 2

B. 3

C. 18

D. 21

E. None of these

Answer: Option A

5.

1397 x 1397 = ?

A. 1951609

B. 1981709

C. 18362619

D. 2031719

E. None of these

Answer: Option A

6.

How many of the following numbers are divisible by 132 ?

264, 396, 462, 792, 968, 2178, 5184, 6336

A. 4

B. 5

C. 6

D. 7

Answer: Option A

Explanation:

132 = 4 x 3 x 11

So, if the number divisible by all the three number 4, 3 and 11, then the number is divisible by 132 also.

264 11,3,4 (/)

396 11,3,4 (/)

462 11,3 (X)

792 11,3,4 (/)

968 11,4 (X)

2178 11,3 (X)

5184 3,4 (X)

6336 11,3,4 (/)

Therefore the following numbers are divisible by 132 : 264, 396, 792 and 6336.

Required number of number = 4.

Posted: **Wed Aug 21, 2013 2:33 pm**

8.

The largest 4 digit number exactly divisible by 88 is:

A. 9944

B. 9768

C. 9988

D. 8888

E. None of these

Answer: Option A

9.

Which of the following is a prime number ?

A. 33

B. 81

C. 93

D. 97

Answer: Option D

Explanation:

Clearly, 97 is a prime number.

The largest 4 digit number exactly divisible by 88 is:

A. 9944

B. 9768

C. 9988

D. 8888

E. None of these

Answer: Option A

9.

Which of the following is a prime number ?

A. 33

B. 81

C. 93

D. 97

Answer: Option D

Explanation:

Clearly, 97 is a prime number.

Posted: **Sun Oct 05, 2014 1:41 pm**

12.

The sum of first five prime numbers is:

A. 11

B. 18

C. 26

D. 28

Answer: Option D

Explanation:

Required sum = (2 + 3 + 5 + 7 + 11) = 28.

Note: 1 is not a prime number.

Definition: A prime number (or a prime) is a natural number that has exactly two distinct natural number divisors: 1 and itself.

The sum of first five prime numbers is:

A. 11

B. 18

C. 26

D. 28

Answer: Option D

Explanation:

Required sum = (2 + 3 + 5 + 7 + 11) = 28.

Note: 1 is not a prime number.

Definition: A prime number (or a prime) is a natural number that has exactly two distinct natural number divisors: 1 and itself.

Posted: **Sun Oct 05, 2014 1:43 pm**

13.

The difference of two numbers is 1365. On dividing the larger number by the smaller, we get 6 as quotient and the 15 as remainder. What is the smaller number ?

A. 240

B. 270

C. 295

D. 360

Answer: Option B

Explanation:

Let the smaller number be x. Then larger number = (x + 1365).

x + 1365 = 6x + 15

5x = 1350

x = 270

Smaller number = 270.

The difference of two numbers is 1365. On dividing the larger number by the smaller, we get 6 as quotient and the 15 as remainder. What is the smaller number ?

A. 240

B. 270

C. 295

D. 360

Answer: Option B

Explanation:

Let the smaller number be x. Then larger number = (x + 1365).

x + 1365 = 6x + 15

5x = 1350

x = 270

Smaller number = 270.