what is divisibility by 7
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DIVISIBILITY BY 7 :
- To determine if a number is divisible by 7, take the last digit off the number, double it and subtract the doubled number from the remaining number. If the result is evenly divisible by 7 (e.g. 14, 7, 0, -7, etc.), then the number is divisible by seven.
- This may need to be repeated several times.
- for ex.28, 8 is the last digit
- double it = 8+8 =16
- 16 - 2 = 14
- at last we got it .......
- another ex.35
- 5 +5 =10
- 10 - 3 = 7 so you got it
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