Odd Man Out and Series

1. Odd Man Out And Series

2. 1. 22, 33, 66, 99, 121, 279, 594
Solution :
Each Number except 279 is a multiple of 11
A. 22 C. 279
B. 33 D. 594

3. 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. 27
B. 18.5 D. 54

4. 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. 588
B. 617 D. 611

5. 4. 3, 10, 21, 36, 55, 70, 105
Solution:
The pattern is 1x3, 2x5, 3x7, 4x9, 5x11, 6x13,
7x15 etc
A. 21 C. 55
B. 36 D. 70

6. 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 Above
B. 125 D. 343

7. 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. 108
B. 115 D. 100

8. 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. 47
B. 21 D. 63

9. 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. 9
B. 6 D. 7

10. 9. 1, 8, 27, 64, 124, 216, 343
Solution :
The nubers are cubes of (1,2,3,4 etc)
A. 124 C. 27
B. 216 D. 64

11. 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. 2
B. 384 D. 24