Divisibility Tests for Numbers 2 to 10

The video tutorial explains how to test if numbers are divisible by 2, 3, 4, 5, 6, 9, and 10. It covers methods like checking the ones place for 2, 5, and 10, summing digits for 3 and 9, and examining the last two digits for 4. Divisibility by 6 requires divisibility by both 2 and 3. The tutorial provides practical examples for each test.

What is the key factor to check if a number is divisible by 2?

• The middle digit

• The first digit

• The last digit

• The sum of all digits

Tags

CCSS.3.OA.D.9

Which of the following numbers is divisible by 2?

• 123

• 579

• 246

• 135

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CCSS.2.OA.C.3

How do you determine if a number is divisible by 3?

• Divide the number by 3 and check for a remainder

• Check if the last digit is 3

• Sum all the digits and check if the sum is divisible by 3

• Check if the number ends in 3

Tags

CCSS.3.OA.D.9

What is the sum of the digits of 123456, and is it divisible by 3?

• 23, Yes

• 22, No

• 20, No

• 21, Yes

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CCSS.4.OA.B.4

To check if a number is divisible by 4, you should:

• Check if the number ends in 4

• Look at the last digit

• Sum all the digits

• Look at the last two digits

Tags

CCSS.4.OA.B.4

Which number is divisible by 5?

• 123

• 456

• 789

• 250

Tags

CCSS.4.OA.B.4

A number is divisible by 6 if it is divisible by:

• 2 and 4

• 3 and 5

• 4 and 5

• 2 and 3

Tags

CCSS.4.OA.B.4

What is the rule for checking if a number is divisible by 9?

• Divide the number by 9 and check for a remainder

• Check if the number ends in 9

• Sum all the digits and check if the sum is divisible by 9

• Check if the last digit is 9

Tags

CCSS.3.OA.D.9

Which of the following numbers is divisible by 9?

• 567

• 345

• 234

• 123

Tags

CCSS.4.OA.B.4

What is the simplest way to check if a number is divisible by 10?

• Sum all the digits

• Divide the number by 10 and check for a remainder

• Check if the number ends in 5

• Check if the last digit is 0

Tags

CCSS.4.OA.B.4