Math, asked by Pprraannaavv, 1 year ago

If sum of digits of n and 2n are same, prove that 9 divides n.

Answers

Answered by Anonymous
0
U can use the hit and trial method...

calculate the sum of the n no. of digits... then calculate the sum of 2n no. of digits..

you'll get two equations which will be both divisible by 9.

Pprraannaavv: More define pls
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