Directions to Solve
Choose the correct alternative that will continue the same pattern and replace the question mark in the given series.
21.
13, 32, 24, 43, 35, ?, 46, 65, 57, 76
A. 45 B. 52
C. 54 D. 55
Answer & Explanation
Answer: Option C
Explanation:
The given sequence is a combination of two series:
I. 13, 24, 35, 46, 57 and II. 32, 43, ?, 65, 76
The pattern in both I and II is + 11. So, missing term = 43 + 11 = 54.
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22.
22, 24, 28, ?, 52, 84
A. 36 B. 38
C. 42 D. 46
Answer & Explanation
Answer: Option A
Explanation:
The pattern is + 2, + 4, + 8, + 16,…..
So, missing term = 28 + 8 = 36.
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23.
3, 15, ?, 63, 99, 143
A. 27 B. 35
C. 45 D. 56
Answer & Explanation
Answer: Option B
Explanation:
The terms of the given series are (22 – 1), (42 – 1),….., (82 – 1), (102 – 1), (122 – 1).
So, missing term = (62 – 1) – (36 – 1) = 35.
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24.
90, 180, 12, 50, 100, 200, ?, 3, 50, 4, 25, 2, 6, 30, 3
A. 150 B. 175
C. 225 D. 250
Answer & Explanation
Answer: Option A
Explanation:
Clearly, 90 = 30 x 3, 180 = 6 x 30, 12 = 2 x 6, 50 = 25 x 2, 100 = 4 x 25, 200 = 50 x 4.
So, missing term = 3 x 50 = 150.
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25.
48, 24, 96, 48, 192, ?
A. 76 B. 90
C. 96 D. 98
Answer & Explanation
Answer: Option C
Explanation:
The pattern is ÷ 2, x 4, ÷ 2, x 4, …..
So, missing term = 192 ÷ 2 = 96.