How do you know which numbers are divisible by...?

Question

...3
...6
...5 and 10
...9

Answer 1

A number is divisible by three if the digits, when added together, make a number that is divisible by three. 27= 2+7= 9 which is divisible by three.

If a number is divisible by six, it will be an even number, divisible by three (above). 36= 3+6= 9 which is divisible by three and 36 is an even number so it's divisible by two as well.

A number is divisible by five if it ends in a five or zero, for example, 75 and 130.

A number is divisible by ten if it ends in zero.

A number is divisble by nine if the digits add up to a number divisible by nine. Such as 99 or 108 or 1161.

I hope this helps!

Answer 2

3: Add the digits of the number. The number is divisible by 3 if the sum of the numbers is a multiple of 3.

ex: 141-- 1+4+1=6 which is a multiple of 3.

6: The same as 3, but the number is also even.

5: The number ends in 0 or 5

10: The number ends in 0

9: Add up the digits of the number. It is divisible by 9 if the numbers add up to a multiple of 9.

ex: 288-- 2+8+8=18 which is a multiple of 9.

Answer 3

if u add the digits together an that is divisible by 3 then so is your origanal number. if 3 and 2 can go into it so can 6. if it ends in 5 or 0 then 5 can go into it. If it ends in 0 10 can go into it. if the sum of the digits is divisible by 9, so is 9.

Answer 4

3 - the sum of the digits will equal a factor of 3
6 - same as above but will also be an even number
5 - units digit is either 5 or 0
10 - units digit is 0
9 - the sum of the digits will equal a factor of 9

Answer 5

3-if its digits added together = something divisible by 3
6-if its digits added together = something divisible by 6
5 and 10-ends in 0 or 5
9-if its digits added together = something divisible by 6

Answer 6

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