Divisibility Rules

Front

What is the rule for a number to be divisible by 10?

Back

A number is divisible by 10 if its last digit (the digit in the ones place) is 0.

Front

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

Back

A number is divisible by 3 if the sum of its digits is a multiple of 3.

Front

What is the rule for a number to be divisible by 2?

Back

A number is divisible by 2 if its last digit is even (0, 2, 4, 6, or 8).

Front

Is 1,126 divisible by 10?

Back

No, because the last digit is 6, not 0.

Front

Is 462 divisible by 3?

Back

Yes, because 4 + 6 + 2 = 12, and 12 is a multiple of 3.

Front

Is 12,505 divisible by 10?

Back

No, because the last digit is 5, not 0.

Front

Is 343 divisible by 3?

Back

No, because 3 + 4 + 3 = 10, and 10 is not a multiple of 3.

Front

Is 917,825,106 divisible by 2?

Back

Yes, because the last digit is 6, which is even.

Front

What is the divisibility rule for 5?

Back

A number is divisible by 5 if its last digit is 0 or 5.

Front

What is the divisibility rule for 4?

Back

A number is divisible by 4 if the last two digits form a number that is divisible by 4.