Understanding Teen and T Numbers

What is a key characteristic of teen numbers?

• They end with a zero.

• They are multiples of ten.

• They are even numbers.

• They contain the number one.

Which of the following is a teen number?

• 13

• 90

• 30

• 40

What number comes after 15 in the sequence of teen numbers?

• 19

• 18

• 17

• 16

Which number is not a teen number?

• 18

• 20

• 19

• 17

What should you remember to avoid confusing teen numbers with T numbers?

• Teen numbers are multiples of five.

• Teen numbers contain the number one.

• Teen numbers are always even.

• Teen numbers end with a zero.