Exercise"Everyone is wise until he speaks."
- (Proverb)
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In this type of questions, one term in the number series is wrong. Find out the wrong term.
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| 1. |
121, 143, 165, 186, 209 |
Answer: Option C
Explanation:
Each term in the series is obtained by adding 22 to the preceding term. So, 186 is wrong and must be replaced by (165 + 22) i.e. 187.
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| 2. |
6, 15, 35, 77, 165, 221 |
Answer: Option E
Explanation:
The terms of the series are products of two consecutive prime numbers i.e. (2 x 3), (3 x 5), (5 x 7), (7 x 11),..... So, 165 is wrong and must be replaced by (11 x 13) i.e. 143.
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| 3. |
8, 13, 21, 32, 47, 63, 83 |
Answer: Option D
Explanation:
The correct pattern is + 5, + 8, + 11, + 14,..... So, 47 is wrong and must be replaced by (32 + 14) i.e. 46.
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| 4. |
1, 2, 4, 8, 16, 32, 64, 96 |
Answer: Option A
Explanation:
Each term of the series is obtained by multiplying the preceding term by 2. So, 96 is wrong and must be replaced by (64 x 2) i.e. 128.
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| 5. |
3, 4, 10, 32, 136, 685, 4116 |
Answer: Option D
Explanation:
The correct pattern is x 1 + 1, x 2 + 2, x 3 + 3, x 4 + 4,..... So, 32 is wrong and must be replaced by (10 x 3 + 3) i.e. 33.
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