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What do squares of numbers of the form 11...1 look like? 

Squares of numbers like 11, 1111, etc. give palindromic numbers - numbers that can be read from left to right the same as from right to left:
111*111=12321
Of course, numbers like 111 are also palindromic.

What do squares of numbers of the form 11...1 look like? 

@hartree had to go straight to calculator to test this! Maths is amazing! I'm going to show my y9 daughter this as she says she doesn't enjoy maths.

What do squares of numbers of the form 11...1 look like? 

@mrwheeler Haha, to be honest, I also didn't enjoy math at that age. But that's because I didn't know much about it!

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