Test Divisibility rules

what is the divisibility rule for 4

• Last two numbers divisible by 4

• Last 3 numbers divisible by 4

• Add all of the digits and divide by 4

• Even number

Which number is divisible by 6

• 1782

• 1213

• 536

Which number is divisible by 9

• 345

• 8522

• 98874

Why does the divisibility rule for 6, that if a number is divisible by 2 and 3 then it is divisible by 6.

• Because 2x3= 6

• 2 and 3 are the prime factors for 6

• You add up all of the digits and then divide by 6.

Which number is divisible by 4 and 8

• 6657

• 7990

• 554672

If a number is divisible by 9 what other number is it divisible by?

• 3

• 4

• 6

• 8

Which number is divisible by 2,3,4,5,6,8,9, and 10

• 2 520

• 765 894

• 820

What is the divisibility rule for 1

• It has to be an even number

• Every number is divisible by 1

• Add up all of the digits and if it is divisible by 1 then the whole number is.

What is the divisibility rule for 3?

• Add up the digits. The sum must be even and divisible by 3.
• The digits must add up to 9.
• The last digit must be a 3.
• Add up the digits. The sum must be divisible by 3.

A number is divisible by 10 if

• It is even

• It ends in 0

• It ends in 0 or 5

• The sum of the digits is a multiple of 10