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Question (11)

QN0020302

Since the sum of digits of 654 is 15, the number is divisible by:

(A) 2 only
(B) 3 only
(C) 3 and 5
(D) 10

Correct Answer: B

Explanation:

15 is divisible by 3.

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Question (12)

QN0020303

A number is divisible by 9 if:

(A) Its last digit is 9
(B) Sum of its digits is divisible by 9
(C) It is odd
(D) It ends in 0

Correct Answer: B

Explanation:

Apply the digit-sum test.

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Question (13)

QN0020304

Which number is divisible by 9?

(A) 423
(B) 729
(C) 517
(D) 638

Correct Answer: B

Explanation:

7+2+9=18, divisible by 9.

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Question (14)

QN0020305

The sum of digits of 864 is:

(A) 16
(B) 17
(C) 18
(D) 19

Correct Answer: C

Explanation:

8+6+4=18.

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Question (15)

QN0020306

Since 18 is divisible by 9, the number 864 is:

(A) Not divisible by 9
(B) Divisible by 9
(C) Prime
(D) Odd

Correct Answer: B

Explanation:

Sum of digits is divisible by 9.

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Question (16)

QN0020307

A number is divisible by 6 if it is divisible by:

(A) 2 and 3
(B) 2 and 5
(C) 3 and 5
(D) 2 and 10

Correct Answer: A

Explanation:

Both conditions must be satisfied.

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Question (17)

QN0020308

Which number is divisible by 6?

(A) 315
(B) 428
(C) 534
(D) 701

Correct Answer: C

Explanation:

534 is even and 5+3+4=12.

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Question (18)

QN0020309

A number is divisible by 4 if:

(A) Last two digits form a number divisible by 4
(B) Last digit is even
(C) Sum of digits is divisible by 4
(D) Last digit is 4

Correct Answer: A

Explanation:

Check only the last two digits.

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Question (19)

QN0020310

Which number is divisible by 4?

(A) 718
(B) 932
(C) 546
(D) 725

Correct Answer: B

Explanation:

32 is divisible by 4.

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Question (20)

QN0020311

The last two digits of 1516 are:

(A) 15
(B) 16
(C) 51
(D) 56

Correct Answer: B

Explanation:

The last two digits are 16.

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