Ramanujan discovered 1729 as a magic number.
Why 1729 is a magic number ?
Brain teaser

Question

anonymous · Answer

ooh ooh i know

anonymous · Answer

well actually i forget 
something like can be written as a sum of squares in two different ways or some such

sammixboo · Answer

I don't. Never knew about this. Would love to hear about it! http://en.wikipedia.org/wiki/1729_%28number%29

wolf1728 · Answer

It is the smallest positive number that can be expressed as the sum of 2 cubes in 2 different ways.
1729= 1,728 + 1 (or 12 cubed + 1 cubed)
1729 = 1,000 + 729 (or 10 cubed + 9cubed)

anonymous · Answer

lol i was close...
squares, cubes, whatever

anonymous · Answer

Two different set of numbers @satellite73 
do you know the numbers

wolf1728 · Answer

lol satellite

sammixboo · Answer

Hehe, so same yet so different, Satellite

anonymous · Answer

yeah you can't square a circle but you can cube one

sammixboo · Answer

Um 

1729 = 1^3 + 12^3 = 9^3 + 10^3

(idk wikipedia)

alexandervonhumboldt2 · Answer

it is magic because:  It is 1729. Discovered by mathemagician Srinivas Ramanujan, 1729 is said to be the magic number because it is the sole number which can be expressed as the sum of the cubes of two different sets of numbers.

alexandervonhumboldt2 · Answer

here you go!!!!!!!!!!!!!!!!!

alexandervonhumboldt2 · Answer

@bingtamekia

anonymous · Answer

what's up @AlexandervonHumboldt2