AB is a two-digit number, where A represents the tens digit and B represents the unit digit

GRE Quant Problem Solving
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AB
AB1634×863 28.7 KB

I brute forced this problem, but does anyone know a better way to solve that will take less time? Thank you!

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Brute-force is OK. Also see the Extreme Quant Problem of the Day for July 8th at Daily Videos - GregMat