IM1 Sec 0.9 Divisibility Rules

Front

What is the divisibility rule for 2?

Back

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

Front

Can an odd number be divisible by 2?

Back

No, an odd number cannot be divisible by 2.

Front

What is the divisibility rule for 3?

Back

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

Front

What is the divisibility rule for 4?

Back

A number is divisible by 4 if the number formed by its last two digits is divisible by 4.

Front

Can an odd number be divisible by 6?

Back

No, an odd number cannot be divisible by 6.

Front

What are the possible last digits of a number that is divisible by 4?

Back

0, 4, 8.

Front

What are the possible hundreds digits of a number that is divisible by 4?

Back

1, 2, 3, 4, 5.

Front

What are the possible hundreds digits of a number that is divisible by 3?

Back

3, 6, 9.

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 10?

Back

A number is divisible by 10 if its last digit is 0.