Divisibility of 7 ?? Hard or Easy #youtubeshorts #ytshorts #mathsshorts

To determine whether a number is divisible by 7, you can use the following rule:

Tae the last digit of the number.

Double that digit.

Subtract the result from the rest of the number, excluding the last digit.

If the result is divisible by 7 (i.e., has no remainder when divided by 7), then the original number is also divisible by 7. Otherwise, it is not.

Here's an example to illustrate the process:

Let's say we want to test whether 987 is divisible by 7.

The last digit is 7.

Double that digit to get 14.

Subtract 14 from the rest of the number, which is 98.

98 - 14 = 84

Check whether 84 is divisible by 7.

84 ÷ 7 = 12 with no remainder.

Since the result is divisible by 7, we can conclude that 987 is also divisible by 7.

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