Factors, Multiples, Divisibility Rules

12 is divisible by...

• 2 and 3

• 5 and 10

• 3 and 9

• 2 and 5

40 is divisible by...

• 2, 5, and 10

• 2, 3, and 9

• 2, 3, and 6

• 3, 5, and 10

The sum of the digits is divisible by 3.  The number is divisible by...

• 3

• 2

• 5

• 10

The digit in the ones place is 0 or 5.  The number is divisible by...

• 5

• 10

• 2

• 6

The number is divisible by 2 and 3.  The number is divisible by...

• 6

• 2

• 3

• 9

The digit in the ones place is 0.  The number is definitely divisible by...

• 10

• 9

• 4

• 3

123 is divisible by...

• 3

• 2

• 5

• 10

The ones digit of the number is 0, 2, 4, 6, or 8 (or the number is an even number).  The number is divisible by...

• 2

• 3

• 5

• 10

Celia has 2,880 beads and wants to place the same number of beads in each of 9 clear storage containers. Which of the following will help determine if 2,880 is divisible by 9?

• 2,880 is an even number and divisible by 3, so 2,880 is divisible by 9.

• 288 is an even number, so 2,880 is not divisible by 9.

• 2 + 8 + 8 + 0 = 18 and 18 is divisible by 9, so 2,880 is divisible by 9

• 8 + 0 = 8 and 8 is not divisible by 9, so 2,880 is not divisible by 9.

What are all the factors of 20?

• 1, 20
  

• 2, 10, 20

• 2, 5, 10, 20
  

• 2, 4, 5, 10, 20