Odd Man Out and Series | Aptitude Questions and Answers | Aptitude Free Online-Tests | LucentBlackBoard

01.

8, 27, 64, 100, 125, 216, 343

A.	27	B.	100
C.	125	D.	343

Answer and Explanation

Answer: 100

Explanation:
The pattern is 23, 33, 43, 53, 63, 73. But, 100 is not a perfect cube.

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02.

6, 9, 15, 21, 24, 28, 30

A.	28	B.	21
C.	24	D.	30

Answer and Explanation

Answer: 28

Explanation:
Each of the numbers except 28, is a multiple of 3.

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03.

3, 8, 15, 24, 35, 48, 55, 63

A.	24	B.	63
C.	35	D.	55

Answer and Explanation

Answer: 55

Explanation:
Add 5, 7, 9, 11, 13, 15.

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04.

Find the wrong number in sequence 36, 54, 18, 27, 9, 18. 5, 4.5

A.	4.5	B.	18.5
C.	54	D.	18

Answer and Explanation

Answer: 18.5

Explanation:
The terms are alternatively multiplied by 1.5 and divided by 3. However 18.5 does not satisfy it

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05.

Find the wrong number in sequence 582, 605, 588, 611, 634, 617, 600

A.	634	B.	611
C.	605	D.	600

Answer and Explanation

Answer: 634

Explanation:
Alternately, 23 is added and 17 is subtracted from the terms. So. 634 is wrong

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06.

Find the wrong number in sequence 46080, 3840, 384, 48, 24, 2, 1

A.	1	B.	2
C.	24	D.	384

Answer and Explanation

Answer: 24

Explanation:
The terms are alternately successively divided by 12, 10, 8, 6, â€¦. Etc. So 24 is wrong.

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07.

Find the wrong number in sequence 1, 8, 27, 64, 124, 216, 343

A.	8	B.	27
C.	64	D.	124

Answer and Explanation

Answer: 124

Explanation:
The numbers are 13, 23, 33, 43, etc. So, 124 is wrong. It must have been 53 i.e 125.

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08.

Find the wrong number in sequence 5, 16, 6, 16, 7, 16, 9

A.	9	B.	7
C.	6	D.	None of these

Answer and Explanation

Answer: 9

Explanation:
Terms at odd places are 5, 6, 7, 8 etc. and each term at even place is 16. So, 9 is wrong.

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09.

Find the wrong number in sequence 6, 13, 18, 25, 30, 37, 40

A.	25	B.	30
C.	37	D.	40

Answer and Explanation

Answer: 40

Explanation:
The difference between two successive terms from the begininning are 7, 5, 7, 5, 7, 5. So 40 is wrong.

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10.

56, 72, 90, 110, 132, 150

A.	72	B.	110
C.	132	D.	150

Answer and Explanation

Answer: 150

Explanation:
The numbers are 7 * 8, 8 * 9, 9 * 10, 10 * 11, 11 * 12, 12 * 13. So, 150 is wrong.

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