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:

  1. The answer is a)64

    it is a series of squares of prime numbers

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  2. it is a series of squares of non-prime numbers

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

    ReplyDelete
  4. ans is 64

    the series is squares of non prime numbers

    ReplyDelete