Question

what is the divisibility test of 7

Answer 1

hii mate....here is ur answer.....

Test of Divisibility By 7

for testing the divisibility of a number by 7 ,we proceed according to the following steps.....

step 1. double the unit digit of the given number.
step 2. subtract the above number from the number formed by excluding the unit digit of the given number.
step 3.if the number so obtained is divisible by 7 then the given number is divisible by 7.

example-
test the divisibility of 672 by 7:
solution--
the given number is 672
now, 67-(2×2) =63,which is divisible by 7.
therefore,672 is divisible by 7

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