Question

What is the Divisibility rule for 7 with example

Answer 1

Answer:

Divisibility rule for 7.

If the result obtained by subtracting the double of last digit of a number from the remaining digits is divisible by 7, the number is divisible by seven.

For example,

In 343,

34 - 2×3 = 28 which is divisible by 7.

Step-by-step explanation:

Answer 2

Answer:

To determine if a number is divisible by 7, take the last digit off the number, double it and subtract the doubled number from the remaining number. If the result is evenly divisible by 7 (e.g. 14, 7, 0, -7, etc.), then the number is divisible by seven. This may need to be repeated several times.