Divisible by 5
This is the only thing you need to check to see if a number is divisible by 5.
The last digit.
A number is divisible by 2 if its last digit is one of these.
0, 2, 4, 6, or 8.
To check if a number is divisible by 3, you add these together.
Its digits
A number is divisible by 6 if it is divisible by these two numbers.
2 and 3.
A number that ends in 5 is divisible by this number.
5
A number ending in this digit will always be divisible by 5.
5
The last digit of a number divisible by 2 must be this type of number.
Even.
True or False: If the digits of a number add to 12, the number is divisible by 3.
True (12 is divisible by 3).
For a number to be divisible by 6, its last digit must be this type (even or odd?).
Even
If a number ends in 8 and its digits add to 9, the number is divisible by this number.
6 (because 8 is even → divisible by 2, and 9 is divisible by 3).
True or False: A number ending in 8 can be divisible by 5.
False
True or False: 137 is divisible by 2.
False (it ends in 7).
What must you do with the sum of the digits to know if a number is divisible by 3?
Check if the sum is divisible by 3.
If the sum of a number’s digits is divisible by 3 and the last digit is even, the number is divisible by this.
6
A number divisible by 6 must also be divisible by this number (clue: it relates to the sum of digits).
3
These two digits are the only possible endings of a number divisible by 5.
0 or 5
Any number ending in 4 belongs to this group (divisible or not divisible by 2?).
Divisible by 2.
If the digits of a number add to 19, the number is divisible by 3. True or False?
False (19 is not divisible by 3).
True or False: A number can be divisible by 6 even if it is NOT divisible by 2.
False (it must be divisible by both 2 and 3).
If a number’s digits add to 27, what two divisibility rules must you check next to see if it’s divisible by 6?
Divisible by 2 (last digit even?) and divisible by 3 (already yes because 27 is divisible by 3).
If a number ends in 0, it is divisible by 5 and this other number.
2
If a number ends in 0, 2, 4, 6, or 8, it is always divisible by this number.
2
The number 243 is divisible by 3 because the digits add to this.
9
To test divisibility by 6, you check divisibility by 2 and this number.
3
A number ends in 0 and its digits add to 15. Name all the numbers (2, 3, 5, 6) it must be divisible by.
2 (ends in 0)
5 (ends in 0)
3 (15 is divisible by 3)
6 (divisible by both 2 and 3)