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#### mathworker

##### Well-known member

- May 31, 2013

- 119

hello we all are familiar with Ramanujan's number 1729 i thought of every one recognizing a special number well thought of mine ....65... .what so special about it (maybe not so special) it is smallest number to be expressed as sum of squares of two distinct pairs of numbers (i am not sure although!!) \(\displaystyle 1^2+8^2 = 4^2+7^2 \)

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