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Question (1)

QN0018242

A number that can be expressed as the product of a number with itself is called a ________.

(A) Prime number
(B) Square number
(C) Composite number
(D) Cube number

Correct Answer: B

Explanation:

A square number is obtained by multiplying a number by itself.

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Question (2)

QN0018243

Which of the following is a perfect square?

(A) 18
(B) 24
(C) 25
(D) 30

Correct Answer: C

Explanation:

25 = 5².

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Question (3)

QN0018244

According to the notation of squares, n × n is written as:

(A) n³
(B) 2n
(C) n²
(D) n+n

Correct Answer: C

Explanation:

n × n = n².

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Question (4)

QN0018245

The square of 7 is:

(A) 14
(B) 42
(C) 49
(D) 56

Correct Answer: C

Explanation:

7 × 7 = 49.

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Question (5)

QN0018246

Which statement is correct?

(A) Every number has an odd number of factors.
(B) Only square numbers have an odd number of factors.
(C) Prime numbers have odd factors.
(D) Composite numbers have odd factors.

Correct Answer: B

Explanation:

Only perfect squares have an odd number of factors.

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Question (6)

QN0018247

The area of a square of side 9 units is:

(A) 18 sq units
(B) 27 sq units
(C) 72 sq units
(D) 81 sq units

Correct Answer: D

Explanation:

Area = side × side = 9 × 9 = 81 sq units.

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Question (7)

QN0018248

Which of the following numbers cannot be a perfect square?

(A) 324
(B) 729
(C) 438
(D) 625

Correct Answer: C

Explanation:

A perfect square cannot end in 8.

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Question (8)

QN0018249

A perfect square can never end with the digit:

(A) 4
(B) 6
(C) 8
(D) 9

Correct Answer: C

Explanation:

Squares never end in 2, 3, 7 or 8.

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Question (9)

QN0018250

Which number has an odd number of factors?

(A) 12
(B) 15
(C) 16
(D) 18

Correct Answer: C

Explanation:

16 is a perfect square.

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Question (10)

QN0018251

The exact definition of a perfect square is:

(A) Product of two different numbers
(B) Product of a number and its successor
(C) Square of a natural number
(D) Sum of two equal numbers

Correct Answer: C

Explanation:

Perfect squares are squares of natural numbers.

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Question (1)

A number that can be expressed as the product of a number with itself is called a ________.

Explanation:

Link:

Question (2)

Which of the following is a perfect square?

Explanation:

Link:

Question (3)

According to the notation of squares, n × n is written as:

Explanation:

Link:

Question (4)

The square of 7 is:

Explanation:

Link:

Question (5)

Which statement is correct?

Explanation:

Link:

Question (6)

The area of a square of side 9 units is:

Explanation:

Link:

Question (7)

Which of the following numbers cannot be a perfect square?

Explanation:

Link:

Question (8)

A perfect square can never end with the digit:

Explanation:

Link:

Question (9)

Which number has an odd number of factors?

Explanation:

Link:

Question (10)

The exact definition of a perfect square is:

Explanation:

Link:

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