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Here we talk Maths!

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Explaining a Math Trick - #1 The Triples Doubled

I am pretty sure that you have all seen already the 'famous' math trick where you take a triple digit number, write it down twice and then when you divide by 7,11,13 you get the three first digits back again! ( You will later see why that is. )   I prefer this version:   Take a triple digit number. ( e.g. 254 ) Write it down twice. ( here, 254254 )   The new number will always be divisible by 91.   If you don't believe me you can go ahead and try it out with as many numbers as you want,
Neikos

Neikos

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