Chang's Math blog

Compilation of math questions by pupils

Thursday, May 29, 2025

Divisibility test for 11

Howie Hua on Instagram: "Divisibility rule of 11 is cool! (Had to cut off the last 3 seconds to fit as a reel) #math #mathematics #maths #mathteacher #teachersofinstagram #mathtricks #mathtrick #stem"
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Posted by ChangCL's Site at 9:51 PM
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      • Gauss Summation
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