# 13 x 13 = 169 and 31 x 31 = 961. Can you find other numbers which give answers in reverse order?

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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?

posted May 10, 2018

11×11 = 121 it's reverse order is also correct.
12×12 = 144 and it's reverse is 21×21 = 441

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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?

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)

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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?

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The square of 13 is 169.
Take the last digit of the square, 9, and place it in the middle, making 196.
This is the square of 14, the next number above 13.
What are the next numbers which also have this property?