Directions to Solve
Choose the correct alternative that will continue the same pattern and replace the question mark in the given series.
1.
1, 1, 2, 6, 24, ?, 720
A. 100 B. 104
C. 108 D. 120
Answer & Explanation
Answer: Option D
Explanation:
The pattern is x 1, x 2, x 3, x 4,…..
So, missing term = 24 x 5 = 120.
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2.
2, 15, 4, 12, 6, 7, ?, ?
A. 8, 8
B. 8, 0
C. 3, 8
D. None of these
Answer & Explanation
Answer: Option B
Explanation:
Let the missing terms of the series be x1 and x2.
Thus, the sequence 2, 15, 4, 12, 6, 7, x1 x2 is a combination of two series :
I. 2, 4, 6, x1 and II. 15, 12, 7, x2I consists of consecutive even numbers.
So, missing term, x1 = 8.
The pattern in II is – 3, – 5,……So, missing term, x2 = 7 – 7 = 0.
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3.
4832, 5840, 6848, ?
A. 7815 B. 7846
C. 7856 D. 7887
Answer & Explanation
Answer: Option C
Explanation:
The pattern is + 1008.
So, missing term – 6848 + 1008 = 7856.
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4.
5824, 5242, ?, 4247, 3823
A. 4467 B. 4718
C. 4856 D. 5164
Answer & Explanation
Answer: Option B
Explanation:
Each term in the series is obtained by subtracting from the preceding term the number
formed by the first three digits of the preceding term.
So, missing term = 5242 – 524 = 4718.
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5.
2, 8, 16, 128, ?
A. 2042 B. 2046
C. 2048 D. 2056
Answer & Explanation
Answer: Option C
Explanation:
Each term in the series, except the first two terms, is the product of the preceding two terms.
So, missing term = 16 x 128 = 2048.