Divisibility Rules

What number is 51 divisible by?

• 2 and 17
• 3 and 17
• 5 and 17
• 7 and 17

What number is 100 divisible by?

• 2, 4, 5, 10
• 2, 5, 10, 50
• 2, 3, 5, 10
• 2, 5, 10, 25

If a number ends in a 0 or a 5, what number is it always divisible by?

• 2
• 3
• 5
• 10

What number is 30 divisible by?

• 2, 4, 5, 6, 10
• 2, 3, 5, 7, 10
• 2, 3, 5, 6, 10
• 2, 3, 4, 6, 10

What number is 45 divisible by?

• 2, 3, 5, 7, 9
• 3, 5, 7, 9
• 3, 5, 9
• 2, 3, 5, 9

What number is 189 divisible by?

• 3, 9, 21
• 2, 3, 5, 9, 21
• 2, 3, 9, 21
• 3, 5, 9, 21

What number is 2340 divisible by?

• 2, 3, 5, 6, 9, 10, 27
• 2, 3, 5, 6, 9, 10, 25
• 2, 3, 5, 6, 9, 10, 26
• 2, 3, 5, 6, 7, 10, 26

What number is 395 divisible by?

• 5, 79
• 2, 5, 79
• 5, 10, 79
• 3, 5, 79

If a number ends in a 0, what number is it always divisible by?

• 2
• 3
• 5
• 10

What is the rule for determining if a number is divisible by 3?

• Add up the digits and see if the sum is even.
• Add up the digits and see if the sum is divisible by 3.
• See if the number ends in a 0 or a 5.
• See if the number is even.