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Divisibilty rules - Coggle Diagram
Divisibilty rules
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7:
Double the last digit and subtract it from a number made by the other digits. The result must be divisible by 7
672 (Double 2 is 4, 67−4=63, and 63÷7=9) Yes
905 (Double 5 is 10, 90−10=80, and 80÷7=11 3/7) No
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