**Directions:** Four/three of the following five/four are alike in a certain way and hence form a group. Which one does not belong to the group?

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- Question 1 of 26
##### 1. Question

Which one does not belong to the group ?

##### Hint

All others are divisible by 7 where as 65 is not divisible by 7.

- Question 2 of 26
##### 2. Question

Which one does not belong to the group ?

##### Hint

All others are not a cube number but 27 is a cube number.

- Question 3 of 26
##### 3. Question

Which one does not belong to the group ?

##### Hint

All other numbers are multiple of 4 except 82.

- Question 4 of 26
##### 4. Question

Which one does not belong to the group?

##### Hint

All other numbers are prime numbers except 127.

- Question 5 of 26
##### 5. Question

Which one does not belong to the group ?

##### Hint

All other numbers are the square of other number except 8.

- Question 6 of 26
##### 6. Question

Which one does not belong to the group ?

##### Hint

All other numbers are prime numbers except 27.

- Question 7 of 26
##### 7. Question

Which one does not belong to the group ?

##### Hint

All other numbers are prime numbers except 9 while 9 is a composite number.

- Question 8 of 26
##### 8. Question

Which one does not belong to the group ?

##### Hint

48 = (7)² –1, 15 = (4)² – 1

24 = (5)² – 1, 35 = (6)² – 1

But, 65 = (8)² + 1

- Question 9 of 26
##### 9. Question

Which one does not belong to the group ?

##### Hint

All others are not divisible by 3 whereas 345 is divisible by 3.

- Question 10 of 26
##### 10. Question

Which one does not belong to the group ?

##### Hint

In all the rest numbers, the third digit is the product of first and second digit.

- Question 11 of 26
##### 11. Question

Which one does not belong to the group ?

##### Hint

(3)³ + 1 = 28,

(4)³ + 1 = 65,

(5)³ + 1 = 126,

6³ + 1 ≠ 215.

- Question 12 of 26
##### 12. Question

Which one does not belong to the group ?

##### Hint

In all the rest pairs, the difference is divisible by 3.

- Question 13 of 26
##### 13. Question

Which one does not belong to the group ?

##### Hint

In all other numbers, the sum of the digits is 17.

- Question 14 of 26
##### 14. Question

Which one does not belong to the group ?

##### Hint

In all the rest groups there is no common factor of the two numbers.

- Question 15 of 26
##### 15. Question

Which one does not belong to the group ?

##### Hint

In all other pairs, one number is the square of the other.

- Question 16 of 26
##### 16. Question

Which one does not belong to the group ?

##### Hint

83 is the only prime number in the group.

- Question 17 of 26
##### 17. Question

Which one does not belong to the group ?

##### Hint

In all other groups, the first number is obtained by adding 2 to the product of the second and the third numbers.

- Question 18 of 26
##### 18. Question

Which one does not belong to the group ?

##### Hint

(9 – 7)² = 4, (13 – 7)² = 36, (11 – 7)² = 16, but (9 – 5)² ≠ 25.

- Question 19 of 26
##### 19. Question

Which one does not belong to the group ?

##### Hint

The difference in all the other cases is 12.

- Question 20 of 26
##### 20. Question

Which one does not belong to the group ?

##### Hint

The product in all other cases is 96.

- Question 21 of 26
##### 21. Question

Which one does not belong to the group ?

##### Hint

The first two are to be added and the third is to subtracted to give a constant no. 6 viz. 5 + 4 – 3 = 6, 8 + 3 – 5 = 6, etc. but 6 + 5 – 4 ≠ 6.

- Question 22 of 26
##### 22. Question

Which one does not belong to the group ?

##### Hint

It does not have ‘4’ in the middle.

- Question 23 of 26
##### 23. Question

Which one does not belong to the group ?

##### Hint

The total no. of digits is seven, others are six.

- Question 24 of 26
##### 24. Question

Which one does not belong to the group ?

##### Hint

It is the set of all prime numbers.

- Question 25 of 26
##### 25. Question

Which one does not belong to the group?

##### Hint

All numbers are prime numbers.

- Question 26 of 26
##### 26. Question

Which one does not belong to the group ?

##### Hint

The sum of all numbers in each set is 100 except (b) ≠ 100 .