Odd Man Out And Series

Prepared By: Raju Makwana

1. 22, 33, 66, 99, 121, 279, 594

Solution : Each Number except 279 is a multiple of 11

A. 22 C. 279B. 33 D. 594

2. 36, 54, 18, 27, 9, 18.5, 4.5

Solution:The terms are alternatively multiplied by 1.5

and devided by 3. However 18.5 does not satisfy it

A. 18 C. 27B. 18.5 D. 54

3. 582, 605, 588, 611, 634, 617, 600

Solution :Alternatively 23 is added and 17 is subtracted

from the terms. So, 634 is wrong.

A. 634 C. 588B. 617 D. 611

4. 3, 10, 21, 36, 55, 70, 105

Solution: The pattern is 1x3, 2x5, 3x7, 4x9, 5x11, 6x13,

7x15 etc

A. 21 C. 55B. 36 D. 70

5. 8, 27, 125, 343, 1331

Solution:The numbers are cubes of primes i.e cubes of

(2, 3, 5, 7, 11 ). so none is wrong

A. 27 C. None Of AboveB. 125 D. 343

6. 125, 123, 120, 115, 108, 100, 84

Solution: Prime numbers 2, 3, 5, 7, 11, 13 have successively been

subtracted. So, 100 is wrong (108-11=97)

A. 125 C. 108B. 115 D. 100

7. 8, 13, 21, 32, 47, 63, 83

Solution :Go on adding 5, 8, 11, 14, 17, 20. So number 47 is

wrong

A. 13 C. 47B. 21 D. 63

8. 5, 16, 6, 16, 7, 16, 9

Solution : Terms at odd places are 5, 6, 7, 8 etc and each

term at even place is 16. so, 9 is wrong

A. 16 C. 9B. 6 D. 7

9. 1, 8, 27, 64, 124, 216, 343

Solution : The nubers are cubes of (1,2,3,4 etc)

A. 124 C. 27B. 216 D. 64

10. 46080, 3840, 384, 48, 24, 2, 1

Solution:The terms are successively divided by 12, 10,

8, 6,....etc. So, 24 is wrong

A. 3804 C. 2B. 384 D. 24