ODD MAN OUT & SERIES

EXAMPLE PROBLEMS:

1.Find the odd one out.
3,5,7,12,17,19
SOLUTION:
In the above series except 12 all elements are odd
numbers.so 12 is the odd one.

2. Find the odd one out.
1,4,9,16,23,25,36

SOLUTION:
In the above series all elements except 23 are perfect sqares.so 23 is odd one.
3. Find the odd one out.
41,43,47,53,61,71,73,81

SOLUTION:
In the above series all elements except 81 are prime numbers.so 81 is odd one.

4.Find the odd one out.
1,4,9,16,20,36,49

SOLUTION:
In the above series all elements except 20 are perfect squares.So 20 is odd one.

5.Find the odd one out.
8,27,64,100,125,216,343

SOLUTION:
In the above series all elements except 100 are perfect cubes.so 100 is odd one.

6. Find the odd one out.
1,5,14,30,50,55,99

SOLUTION:
In the above series all elements in the pattern like 12, 12+22,12+22+32,................. But 50 is not in this pattern,so odd one.

7.Find the odd one out.
835,734,642,751,853,981,532

SOLUTION:
In the above series,the difference between third and first digit of each element is equal to its middle digit.But 751 is not in this pattern,so odd one.

8. Find the odd one out.
385,4462,572,396,427,672,264

SOLUTION:
In the above series,the sum of first and third digit
of each element is equal to its middle digit.But 427is not in this pattern,so odd one.

9. Find the odd one out.
331,482,551,263,383,242,111

SOLUTION:
In the above series,the product of first and third digit of each element is equal to its middle digit. But 383 is not in this pattern,so odd one.

10. Find the odd one out.
2,5,10,17,26,37,50,64

SOLUTION:
In the above series,the elements are in the pattern of x2+1,Where x is 1,2,3,4,5,6,7.but 82+1 is not equal to 64.It is 65.64 is odd one.

11. Find the odd one out.
19,28,39,52,67,84,102

SOLUTION:
In the above series,the elements are in the pattern of x2+3,Where x is 4,5,6,7,8,9,10.but 102+3 is not equal to 102.It is 103.so 102 is odd one.

12.Find the odd one out.
253,136,352,460,324,613,244

SOLUTION:
In the above series,the elements are in the pattern of x2+3,Where x is 4,5,6,7,8,9,10.but 102+3 is not equal to 102.It is 103.so 102 is odd one.