Divisibility (3-digit Rule for 11s)

Dec 22, 2021 | Yukon

This week, we use only addition to see if a 3 digit number is divisible by 3!

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There's an easy trick to see if a 3 digit number is divisible by 11!  Simply add the first and last digits.  If they add up to the middle number, then it's divisble by 11!  For example:

792

7+2=9

9 is the middle digit

therefore, 792 is divisble by 11!

 

Ready for some more? Try out the practice problems below!

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