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Question (1)

QN0033357

Which of the following can be a possible multiplier if the numbers coming out of a hidden number machine are 28, 36, 48, and 72?

(A) 3
(B) 4
(C) 5
(D) 7

Correct Answer: B

Explanation:

28, 36, 48 and 72 are all divisible by 4.

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Question (2)

QN0033358

The numbers 1, 2 and 4 are common factors of 28, 36, 48 and 72. Which statement is correct?

(A) Every common factor divides all the numbers exactly.
(B) A common factor divides only one number.
(C) A common factor is always greater than the numbers.
(D) A common factor is always prime.

Correct Answer: A

Explanation:

A common factor divides each of the given numbers exactly.

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Question (3)

QN0033359

Which of the following is a factor of both 36 and 72?

(A) 5
(B) 7
(C) 4
(D) 11

Correct Answer: C

Explanation:

4 divides both 36 and 72 exactly.

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Question (4)

QN0033360

The product of two or more factors gives a ________.

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

Correct Answer: B

Explanation:

The product of factors is called a multiple.

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Question (5)

QN0033361

Which of the following arrays can represent the number 15?

(A) 4 × 4
(B) 3 × 5
(C) 2 × 8
(D) 6 × 3

Correct Answer: B

Explanation:

3 × 5 = 15.

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Question (6)

QN0033362

How many different factor pairs does the number 12 have?

(A) 2
(B) 3
(C) 4
(D) 6

Correct Answer: B

Explanation:

The factor pairs are 1×12, 2×6 and 3×4.

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Question (7)

QN0033363

Which pair forms an array for 20?

(A) 5 × 5
(B) 2 × 10
(C) 3 × 7
(D) 6 × 4

Correct Answer: B

Explanation:

2 × 10 = 20.

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Question (8)

QN0033364

Which of the following numbers is prime?

(A) 20
(B) 25
(C) 37
(D) 46

Correct Answer: C

Explanation:

37 has exactly two factors: 1 and 37.

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Question (9)

QN0033365

Why is 13 called a prime number?

(A) It has many factors.
(B) It has exactly two factors.
(C) It is even.
(D) It is a multiple of 4.

Correct Answer: B

Explanation:

A prime number has exactly two factors.

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Question (10)

QN0033366

Which number has only the factors 1 and itself?

(A) 14
(B) 25
(C) 32
(D) 13

Correct Answer: D

Explanation:

13 is a prime number.

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Question (1)

Which of the following can be a possible multiplier if the numbers coming out of a hidden number machine are 28, 36, 48, and 72?

Explanation:

Link:

Question (2)

The numbers 1, 2 and 4 are common factors of 28, 36, 48 and 72. Which statement is correct?

Explanation:

Link:

Question (3)

Which of the following is a factor of both 36 and 72?

Explanation:

Link:

Question (4)

The product of two or more factors gives a ________.

Explanation:

Link:

Question (5)

Which of the following arrays can represent the number 15?

Explanation:

Link:

Question (6)

How many different factor pairs does the number 12 have?

Explanation:

Link:

Question (7)

Which pair forms an array for 20?

Explanation:

Link:

Question (8)

Which of the following numbers is prime?

Explanation:

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Question (9)

Why is 13 called a prime number?

Explanation:

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Question (10)

Which number has only the factors 1 and itself?

Explanation:

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