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Question (21)

QN0019253

The simplest form of 36 : 54 is:

(A) 2 : 3
(B) 3 : 2
(C) 4 : 5
(D) 1 : 2

Correct Answer: A

Explanation:

Divide both terms by 18 to get 2 : 3.

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Question (22)

QN0019254

If 5 : 8 :: 15 : x, then x equals:

(A) 18
(B) 20
(C) 24
(D) 28

Correct Answer: C

Explanation:

Since the first term is multiplied by 3, the second term also becomes 8 × 3 = 24.

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Question (23)

QN0019255

Which ratio is proportional to 2 : 7?

(A) 4 : 12
(B) 8 : 28
(C) 10 : 40
(D) 12 : 50

Correct Answer: B

Explanation:

8 : 28 simplifies to 2 : 7.

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Question (24)

QN0019256

The HCF of 42 and 56 is:

(A) 7
(B) 14
(C) 21
(D) 28

Correct Answer: B

Explanation:

The greatest common factor of 42 and 56 is 14.

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Question (25)

QN0019257

The ratio 81 : 108 in simplest form is:

(A) 4 : 3
(B) 3 : 4
(C) 2 : 3
(D) 1 : 2

Correct Answer: B

Explanation:

Divide both terms by 27.

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Question (26)

QN0019258

If 24 : 36 :: 8 : x, then x is:

(A) 10
(B) 12
(C) 14
(D) 16

Correct Answer: B

Explanation:

24 : 36 = 2 : 3, so 8 : x = 2 : 3 and x = 12.

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Question (27)

QN0019259

The simplest form of 63 : 84 is:

(A) 4 : 3
(B) 3 : 4
(C) 7 : 8
(D) 5 : 6

Correct Answer: B

Explanation:

Divide both terms by 21.

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Question (28)

QN0019260

A ratio 16 : 24 can be simplified by dividing by:

(A) 2 only
(B) 4 only
(C) 8 only
(D) 12 only

Correct Answer: C

Explanation:

Dividing by 8 gives the simplest form 2 : 3.

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Question (29)

QN0019261

If 9 : 12 :: 15 : x, then x equals:

(A) 18
(B) 20
(C) 22
(D) 24

Correct Answer: B

Explanation:

9 : 12 = 15 : x gives x = 20.

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Question (30)

QN0019262

The ratio of 250 g to 1 kg is:

(A) 1 : 2
(B) 1 : 3
(C) 1 : 4
(D) 1 : 5

Correct Answer: C

Explanation:

Convert 1 kg into 1000 g. Thus 250 : 1000 = 1 : 4.

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