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August 14, 2008

What is the number?

what is number in this series
1,16,36,__,81,100,144

a)64
b)61
c)49
d)144

please explain the logic...

6 comments:

Anonymous said...

The answer is a)64

it is a series of squares of prime numbers

Anonymous said...

it is a series of squares of non-prime numbers

Anonymous said...

Who Knows :L

Swetha said...

Itz a series of squares of non-prime numbers.. so Ans is 64.......

sundeep said...

64....
v r squaring non prime nums

sirisha said...

ans is 64

the series is squares of non prime numbers