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## 'Please Explain' printed from http://nrich.maths.org/

Take a look at the two multiplications below. What do you notice?

$32 \times 46 = 1472$

$23 \times 64 = 1472$

The digits in this multiplication have been reversed, and the
answer has stayed the same!

Is this surprising? Can you find other examples where this
happens?

What do you notice about the pairs of two digit numbers that
produce this special result?