Saturday 28 May 2011

Interesting Number Pattern - 24 - Question!

Find this 4 digit number - call it as ABCD

- It is a perfect square
- If you reverse the number, it is also a perfect square (DCBA)
- The sum of the first two digits and the last two digits of the number is the square root of DCBA

Please don't use Google or don't write a  program :)

More than the answer just examine ABCD, DCBA after you are through and see how simple but beautiful the pattern is
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2 comments:

  1. Mahesh28 May 2011 at 07:34

    I found a number 9801 (99*99) sum of 98+01=99 and also square root of 1089 is 33. But i think i am not satisfying 3rd condition here, but sum of first and last two digits is square root of ABCD and not DCBA.

    Trying to find the number that satisfies third condition

    ReplyDelete
  2. Anand29 May 2011 at 02:21

    Mahesh - This is correct. The sum of the first and last two digits is 10+89 = 99 and it is the root of 9801 which is DCBA

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