Divisibility Rules and Examples

This video tutorial covers the rules for determining if a number is divisible by 2, 3, 4, 5, 6, 8, 9, and 10. It explains each rule with examples, such as checking the last digit for divisibility by 2, summing digits for divisibility by 3, and checking the last two digits for divisibility by 4. The tutorial also discusses the combination of rules, like divisibility by 6, which requires divisibility by both 2 and 3. The video concludes with practical examples to apply these rules.

Which of the following numbers is divisible by 2?

• 431

• 512

• 621

• 813

Tags

CCSS.4.OA.B.4

A number is divisible by 4 if:

• The number ends in 0

• The last digit is even

• The last two digits form a number divisible by 4

• The sum of the digits is divisible by 4

Tags

CCSS.4.OA.B.4

To check if a number is divisible by 8, you should:

• Check if the last two digits are divisible by 8

• Check if the last three digits are divisible by 8

• Check if the last digit is 8

• Check if the number ends in 0

Tags

CCSS.4.OA.B.4

What is the rule for a number to be divisible by 3?

• The number ends in 0

• The number is even

• The sum of the digits is divisible by 3

• The number ends in 3

Tags

CCSS.4.OA.B.4

A number is divisible by 6 if:

• The sum of the digits is 6

• It is divisible by 2 and 3

• It ends in 6

• It is divisible by 3 and 4

Tags

CCSS.4.OA.B.4

Which number is divisible by 9?

• 512

• 431

• 639

• 726

Tags

CCSS.4.OA.B.4

A number is divisible by 10 if it:

• Is divisible by 5

• Ends in 0

• Ends in 5

• Is even

Tags

CCSS.3.OA.D.9

For a number to be divisible by 5, it must:

• End in 0 or 5

• Be even

• End in 8

• Be divisible by 10

Tags

CCSS.4.OA.B.4

Which of the following numbers is divisible by 6?

• 813

• 621

• 372

• 362

Tags

CCSS.4.OA.B.4

If a number ends in 0, it is divisible by:

• 2, 5, and 10

• 3, 6, and 9

• 4, 8, and 12

• 1, 7, and 11

Tags

CCSS.4.OA.B.4