Question

determine 10395 is divisible by 11​

Answer 1

Answer:

as we know,

5 and 9 are co-prime numbers.

so we will test the divisibility of the number by 5 and 9.

45=5×9

Factors of 5=1,5

Factors of 9=1.3,9

Therefore, 5 and 9 are co-prime numbers.

Since the last digit of 25110 is 0. It is divisible by 5.

Sum of the digits of 25110=2+5+1+1+0=9

As the sum of the digits of 25110 is divisible by 9, therefore, 25110 is divisible by 9.

Since the number is divisible by 5 and 9 both, it is divisible by 45.