Answer:
<u>★</u><u> </u><u>Divisibility</u><u> </u><u>rule</u><u> </u><u>for</u><u> </u><u>3</u><u> </u><u>-</u>
If the sum of all the digits divisible by 3 then the number is divisible by 3.
Here, we take an example for better understanding -
<u>Example</u><u> </u><u>1</u><u> </u><u>-</u> 3525
Add up the digits - 3 + 5 + 2 + 5
→ 15
As, 15 is divisible by 3. So, 3525 is a factor of 3.
★<u> </u><u>Divisibility</u><u> rule</u><u> </u><u>for</u><u> </u><u>6</u><u> </u><u>-</u>
A number is to be divisible by 6 , if the number is also divisible by 2 and 3.
<u>Exampl</u><u>e</u><u> </u><u>2</u><u> </u><u>-</u> 132
Add up the digits = 1 + 3 + 2 = 6
As, 6 is divisible by 2 and it's also divisible by 3. Then, 132 is a factor of 6.
★ <u>Divisibility</u><u> rule</u><u> for</u><u> </u><u>9</u><u> </u><u>-</u>
If the sum of all the digits is divisible by 9 then the number is divisible by 9. Just like we'd in 3.
<u>Example</u><u> </u><u>3</u><u> </u><u>-</u> 1052
Add up the digits - 10 + 5 + 2 = 17
As, 17 is not divisible by 9. So, 1052 is also not divisible by 9.
