Question

Check for test of divisibility of the following
numbers by 7.
1)753
2)203​

Answer 1

Answer:

1)753

753 is not divisible by 7.

Multiply the last digit with 2 and then subtract the product from the remaining digits.

75-(3×2)=69

69 is not divisible by 7 so 753 is not divisible by 7.

2)203

203 is divisible by 7

Multiply the last digit with 2 and then subtract the product from the remaining digits.

20-(3×2)=14

14 is divisible by 7 so 203 is divisible by 7.