Question

Is 645777890 divisible by 7 tell with the help of short method​

Answer 1

Answer:

multiply last digit by 2.means 2×0 = 0 subtract 64577789- 0 = 64577789 so it's not divisible by 7 .so 645777890 is not divisible by 7.

Answer 2

Answer: no

Step-by-step explanation:

Well... actually the divisibility rule of 7 states that

01. Multiply the last digit with 2

02.Subtract the above answer from the whole number with the exception of the last digit

03.If the difference is 0 or a multiple of 7, then it is divisible by 7

Still not sure whether it can be divisible by 7? then continue on the same procedure.

But this rule can at most be only used for three - digit numbers.

(Seeing by the division method is much more short method rather than applying the above rule for larger numbers to see whether they are divisible by 7 )