Wednesday, October 8, 2008

Series bonanza

1.18,46,94,63,52, ….

2.613452,25431,1342,231....

3.11,2,4,16,37,58...

4.0,9,26,65...

4 comments:

Unknown said...

for 3rd ... ans s 89
1^2+1^2=2
2^2=4
4^2=16
1^2+6^2=37
3^2+7^2=58
5^2+8^2=89......

Unknown said...

for 4th ans s 124
1^3-1=0
2^3+1=9
3^3-1=26
4^3+1=65
5^3-1=124...........

Unknown said...

for 2nd ans s 12..
no. of digits in each term decreases as 6,5,4,3,2,...
and d last digit of preceeding term s starting of succeeding term hence it is 12........

Unknown said...

for 1st ans is 61...
the given series is reverse of squares of 9,8,7,6,5,4...

ans for the 4th is 124...
logic is 1^3-1,2^3+1,3^3-1,4^3+1,5^3-1...