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ODD MAN OUT & SERIESEXAMPLE PROBLEMS:
13.Find the odd one out.
2,5,10,50,500,5000
SOLUTION:
In the above series,the pattern as follows:
1st term * 2nd term = 3rd term
2nd term * 3rd term = 4th term
3rd term * 4th term = 5th term
But 50*500=25000 which is not equal to 5000.
so 5000 is odd one.
14.Find the odd one out.
582,605,588,611,634,617,600
SOLUTION:
In the above series, alternatively 23 is added and 17 is subtracted from the terms.
So 634 is odd one.
15.Find the odd one out.
46080,3840,384,48,24,2,1
SOLUTION:
In the above series,the terms are successively divided by
12,10,8,6,..... so 24 is not in this pattern.
so 24 is odd one.
16.Find the odd one out.
5,16,6,16,7,16,9
SOLUTION:
In the above series,the terms at odd places are 5,6,7,8.......and at even places is 16.
So 9 is odd one.
17.Find the odd one out.
6,13,18,25,30,37,40
SOLUTION:
In the above series,the difference between two successive terms from the beginning are 7,5,7,5.........
so 40 is odd one.
18.Find the odd one out.
56,72,90,110,132,150
SOLUTION:
The above series as follows:
7*8,8*9,9*10,10*11,11*12,12*13.
So it will be 56,72,90,110,132,156
so 150 is wrong.
19.Find the odd one out.
1,2,6,15,31,56,91
SOLUTION:
Add 1square ,2square ,....,6square to the terms.
so 91 is wrong.
20.Find the odd one out.
105,85,60,30,0,-45,-90
SOLUTION:
Subtract 20,25,30,35,40,45 from the terms.
So 0 is odd one.
21.Find out the odd one out.
3,10,21,36,55,70,105
SOLUTION:
The pattern in the series is
1*3, 2*5, 3*7, 4*9, 5*11, 6*13, 7*15.
So the series will be 3,10,21,36,55,78,105.
So 70 is wrong term in the series.
22.Find out the odd one out.
4,9,19,39,79,160,319
SOLUTION:
Double the number and add 1 to it.
So the series will be 4,9,39,79,159,319.
So 160 is wrong.
23.Find out the odd one out.
10,14,28,32,64,68,132.
SOLUTION:
Alternatively add 4 and double the next term.
So 132 is wrong.
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