Aptitude SeriesPage 4
25. | Find out the missing number in sequence
165, 195, 255, 285, 345, …
| | (a)515 | | (b)425 | | (c)435 | | (d)500 |
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Answer is: CEach number is 15 multiplied by a prime number (15x11)(15x13)(15x17)(15x19)(15x23) So , 15x29 = 435
26. | Find out the missing number in sequence
7, 26, 63, 124, 215, 342,…
| | (a)511 | | (b)525 | | (c)530 | | (d)535 |
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Answer is: APattern Cube -1
8 - 1 = 7
27 – 1 = 26
64 – 1 = 63 and so on…
27. | Find out the missing number insequence
71, 76, 69, 74, 67, 72, …
| | (a)75 | | (b)65 | | (c)80 | | (d)84 |
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Answer is: BAlternately add 5 and subtract 7
28. | Find out the missing number in sequence
9, 12, 11, 14, 13, …. , 15
| | (a)14 | | (b)15 | | (c)16 | | (d)17 |
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Answer is: CAlternately add 3 and subtract 1.
29. | Find out wrong number in this series
40960, 10240, 2560, 640, 200, 40, 10 | | (a)200 | | (b)640 | | (c)10 | | (d)40 |
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Answer is: ADivided by 4 so, 200 is wrong.
30. | Find out wrong number in this series
64, 71, 80, 91, 104, 119, 135, 155
| | (a)104 | | (b)119 | | (c)135 | | (d)155 |
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Answer is: BAdding 7, 9, 11, 13, 15, 17 , So 135 is wrong
31. | Find out wrong number in this series
7, 8, 18, 57, 288, 1165, 6996
| | (a)57 | | (b)288 | | (c)1165 | | (d)6996 |
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Answer is: B(x1+1)(x2+2)(x3+3)(x4+4)x5+5(x6+6) are required numbers so 228 is wrong.
32. | Find out wrong number in this series
19, 26, 33, 46, 59, 74, 91
| | (a)46 | | (b)33 | | (c)74 | | (d)59 |
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Answer is: BAdding 7, 9, 11, 13, 15, 17 respectively. So 33 is wrong
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