ans is 25
a^n + b^n is always divisible by a+b ( when n is odd)
My take
set 148-
1) 1
2) 5
3) 4
Set 149
1) 3
2) 3
3) 2
set 151
1-3
2-4
3-1
4-1
5-4
6-4
7-2
8-1
9-1
10-3
There are 7 children standing in a line,not all oh whom have same no of cakes with them.If the first child distributes his cakes to the remaining 6 children,such that he doubles their resp no.of cakes,then he will be left with 4 cakes.Instead if 2nd child takes away 2 cakes from each of the remaining 6 children,then he will be left with 3 cakes less than the no of cakes that the 1st child initially had.What is the total no of cakes that are there with 3rd to 7th child???
Set 59
1. e-BCD
2. a- A & b
3. a- A