Question

Test divisbility of the following numbers by 9 and 11 a) 34625

Answer 1

Answer:

Test divisibility by 9

A number is divisible by 9 if the sum of all number is divisible by 9

Sum of all digits= 3+4+6+2+5= 20

which is not divisible by 9

Hence,34625 is not divisible by 9.

Test divisibility by 11

If the sum of the digits in the odd places and the sum of the digits in the even places difference is a multiple of 11 or zero.

Sum of number at odd place=5+6+3=14

Sum of number at even place=2+4=10

Difference between odd and even places= 14-10=4 which is neither 0 nor 11 it means it is not divisible by 11

Hence,24625 is not divisible by 11.