Question

Test the divisibility of the following numbers by 11. 1. 61809 2. 123574 3. 70169803

Answer 1

Answer:

divisibility rule of 11

sum of all odd digits-sum of all even digits digits should be multiple of 11 and 0

1. 61809=9+8+6-(0+8)=23-1=22

2.123574=4+5+2-(7+3+1)=0

3. 70169803=3+8+6+0-(0+9+1+7)=0