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Question (31)

QN0033387

Which of the following numbers has factors 1, 2, 5 and 10?

(A) 8
(B) 10
(C) 12
(D) 15

Correct Answer: B

Explanation:

Factors of 10 are 1, 2, 5 and 10.

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Question (32)

QN0033388

If 3 × 5 = 15, then 15 is a ________ of 3 and 5.

(A) factor
(B) divisor
(C) multiple
(D) remainder

Correct Answer: C

Explanation:

The product of factors is a multiple.

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Question (33)

QN0033389

Which number among these has the greatest number of factor pairs?

(A) 13
(B) 14
(C) 20
(D) 25

Correct Answer: C

Explanation:

20 has factor pairs 1×20, 2×10 and 4×5.

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Question (34)

QN0033390

Which of the following numbers is touched by both a jumper moving 2 steps and another moving 4 steps?

(A) 6
(B) 8
(C) 10
(D) 14

Correct Answer: B

Explanation:

8 is a common multiple of 2 and 4.

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Question (35)

QN0033391

A hidden machine multiplies each input by 1. If the output is 36, the input is

(A) 18
(B) 36
(C) 72
(D) 0

Correct Answer: B

Explanation:

Multiplying by 1 leaves the number unchanged.

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