Verbal Reasoning - Mental Ability Questions

Here the first letter of the group is moved with a gap of one letter, the second letter of the group is backwardness and the third letter of the group is forwardness proceeding like this we get the letter group "JGW"

1*3+1=4

4*3+4=16

16*3+16=64

64*3+64=208 but it is given 126

Meaningful words are ROSE, SORE and EROS.

Note the meaning of the words SORE and EROS with the help of dictionary.

My mother's mother — My grandmother: My grandmother's only son — My maternal uncle. So, the woman is man's niece. 

The given number series follows a pattern that, 4, 15, 37, 81, ?

4

4 + 11 = 15

15 + 22 = 37

37 + 44 = 81

81 + 88 = 169

Hence, the next number in the sequence is 169.