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## Aptitude SeriesPage 2

9.

 Find out the wrong number in each sequence 46080, 3840, 384, 48, 24, 2, 1 (a)46080 (b)384 (c)48 (d)24
Answer is: DThe terms are respectively divided by 12, 10, 8, 6, 4, 2 but 24 is wrong.

10.

 Find out the wrong number in each sequence 56, 72, 90, 110, 132, 150 (a)110 (b)132 (c)72 (d)150
Answer is: DNumbers (7x8),(8x9),(9x10),(10x11),(11x12),(12x13) ,So 150 is wrong.

11.

 Find out the wrong number in each sequence 25, 36, 49, 81, 121, 169, 225 (a)25 (b)36 (c)49 (d)81
Answer is: BSquare of odd numbers except 36.

12.

 Find out the wrong number in each sequence 105, 85, 60, 30, 0, -45, -90 (a)85 (b)60 (c)30 (d)0
Answer is: DSubtract 20, 25, 30, 35, 40,45, So 0 is wrong.

13.

 Find out the wrong number in each sequence 125, 127, 130, 135, 142, 153, 165 (a)165 (b)153 (c)142 (d)135
Answer is: APrime numbers 2, 3, 5, 7, 11, 13 are to be added successively. So, 165 is wrong

14.

 Find out the wrong number in each sequence 16, 36, 64, 81, 100, 144, 190 (a)81 (b)100 (c)144 (d)190
Answer is: DAll numbers are square except 190.

15.

 Find out the wrong number in each sequence 125, 123, 120, 115, 108, 100, 84 (a)120 (b)115 (c)108 (d)100
Answer is: DPrime numbers 2, 3, 5, 7, 11, 13 have successively been subtracted. So, 100 is wrong. It must be (108 - 11) = 97

16.

 Find out the wrong number in each sequence 3, 10, 21, 36, 55, 70, 105 (a)70 (b)55 (c)36 (d)21
Answer is: APattern (1x3),(2x5),(3x7),(4x9),(5x11),(6x13),(7x15), So, 70 is wrong.