13 x 13 = 169 and 31 x 31 = 961. Can you find other numbers which give answers in reverse order when they are reversed and multiplied by themselves?
11*11 = 121 & 11*11 = 121 12*12 = 144 & 21*21 = 441 13*13 = 169 & 31*31 = 961 22*22= 484 & 22*22 = 484
P.S: Had to use C program to figure this out !
What is the number if it divides exactly by 13 and when you write its digits in reverse order you make a square number. (You get a square number when you multiply a number by itself - 64 is square because it is 8 times 8)
23 x 64 gives the same answer as 46 x 32 (everything written in reverse order) can you find other pairs of two digit numbers with different digits that work like this?
