Directions to Solve
Choose the correct alternative that will continue the same pattern and replace the question mark in the given series.
21.
4, 10, ?, 82, 244, 730
A. 24 B. 28
C. 77 D. 218
Answer & Explanation
Answer: Option B
Explanation:
Each number in the series is 2 less than thrice the preceding number.
So, missing number = (10 x 3) – 2 = 28.
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22.
1, 5, 13,25,41,?
A. 51 B. 57
C. 61 D. 63
Answer & Explanation
Answer: Option C
Explanation:
The pattern is + 4, + 8, + 12, + 16……
So, missing term = 41 + 20 = 61.
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23.
325, 259, 204, 160, 127, 105, ?
A. 94 B. 96
C. 98 D. 100
Answer & Explanation
Answer: Option A
Explanation:
The pattern is – 66, – 55, – 44, – 33, – 22, …..
So, missing term = 105 – 11 = 94.
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24.
4, 7, 12, 19, 28, ?
A. 30 B. 36
C. 39 D. 49
Answer & Explanation
Answer: Option C
Explanation:
The pattern is + 3, + 5, + 7, + 9, …..
So, missing term = 28 + 11 = 39.
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25.
5760, 960, ?, 48, 16, 8
A. 120 B. 160
C. 192 D. 240
Answer & Explanation
Answer: Option C
Explanation:
The pattern is ÷ 6, ÷ 5, ÷ 4, ÷ 3, ÷ 2.
So, missing term = 960 – 5 = 192.