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Question (21)

QN0016007

A rectangular grid will contain an odd number of small squares only when:

(A) Both dimensions are even
(B) One dimension is even
(C) Both dimensions are odd
(D) One dimension is prime

Correct Answer: C

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Question (22)

QN0016008

Which expression can produce both odd and even values?

(A) 2n
(B) 2n + 1
(C) 3n + 4
(D) 8n + 2

Correct Answer: C

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Question (23)

QN0016009

Which expression always has even parity?

(A) 100p
(B) 2p + 1
(C) 4p + 3
(D) 6p + 5

Correct Answer: A

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Question (24)

QN0016010

The nth even number is given by:

(A) n + 2
(B) 2n
(C) 2n + 1
(D) n²

Correct Answer: B

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Question (25)

QN0016011

The formula for the nth odd number is:

(A) 2n + 1
(B) 2n
(C) 2n − 1
(D) n² − 1

Correct Answer: C

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Question (26)

QN0016012

What is the 50th even number?

(A) 98
(B) 99
(C) 100
(D) 101

Correct Answer: C

Explanation:

50th even number = 2 × 50 = 100

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Question (27)

QN0016013

What is the 50th odd number?

(A) 99
(B) 100
(C) 101
(D) 102

Correct Answer: A

Explanation:

50th odd number = 2 × 50 − 1 = 99

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Question (28)

QN0016014

What is the 100th even number?

(A) 100
(B) 198
(C) 199
(D) 200

Correct Answer: D

Explanation:

100th even number = 2 × 100 = 200

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Question (29)

QN0016015

What is the 100th odd number?

(A) 198
(B) 199
(C) 200
(D) 201

Correct Answer: B

Explanation:

100th odd number = 2 × 100 − 1 = 199

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Question (30)

QN0016016

Maria and Martin are exactly one year apart in age. The sum of their ages can never be:

(A) 103
(B) 105
(C) 111
(D) 112

Correct Answer: D

Explanation:

Consecutive numbers always have an odd sum.

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