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Question (11)

QN0010087

Which term of the AP 2, 6, 10, 14, … is 58?

(A) 13th
(B) 14th
(C) 15th
(D) 16th

Correct Answer: C

Explanation:

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Question (12)

QN0010088

The sequence 20, 17, 14, 11, … is an AP because:

(A) terms are doubled
(B) terms increase equally
(C) consecutive terms differ by –3
(D) terms are squared

Correct Answer: C

Explanation:

Common difference is –3.

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Question (13)

QN0010089

Find the 25th term of the AP –2, 1, 4, 7, …

(A) 68
(B) 70
(C) 72
(D) 74

Correct Answer: B

Explanation:

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Question (14)

QN0010090

If the 7th term of an AP is 31 and the common difference is 4, then the first term is:

(A) 3
(B) 5
(C) 7
(D) 9

Correct Answer: C

Explanation:

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Question (15)

QN0010091

Which of the following cannot be an AP?

(A) 2, 5, 8, 11
(B) 10, 8, 6, 4
(C) 1, 3, 6, 10
(D) –4, –1, 2, 5

Correct Answer: C

Explanation:

Differences are not equal.

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Question (16)

QN0010092

The 18th term of the AP 100, 95, 90, 85, … is:

(A) 10
(B) 15
(C) 20
(D) 25

Correct Answer: B

Explanation:

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Question (17)

QN0010093

Find the common difference if the 12th term of an AP is 38 and the first term is 5.

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

Correct Answer: B

Explanation:

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Question (18)

QN0010094

Which term of the AP 9, 15, 21, 27, … is 99?

(A) 14th
(B) 15th
(C) 16th
(D) 17th

Correct Answer: C

Explanation:

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Question (19)

QN0010095

In an AP, if and , then the AP is:

(A) increasing
(B) decreasing
(C) constant
(D) geometric

Correct Answer: C

Explanation:

Zero common difference gives constant terms.

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Question (20)

QN0010096

Find the 9th term of the AP 1.5, 3, 4.5, 6, …

(A) 12
(B) 13.5
(C) 15
(D) 16.5

Correct Answer: B

Explanation:

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