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A quick maths mind reading trick you can do.  It works because abc minus cba is always a multiple of 99.

A quick maths mind reading trick you can do.  It works because abc minus cba is always a multiple of 99.

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    “abc minus cba is always a multiple of 99” abc - cba = 99x?? is that right? WHAT IS THIS SORCERY?!
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Matt Henderson

I post original stuff about maths, space, computational linguistics and other things that I like. This blog is meant to be accessible and interesting to people of all backgrounds. My undergrad was maths in Cambridge, and I'm now starting research in Speech and Language technology. Email me at If you're new, check out this overview of my posts. All code posted is in Mathematica.

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