What number comes after 9?

How many cats are in this picture?

Ben has 3 apples. His mom steals one of his apples. How many does he have now?

Is 45 an even or odd number?

What number comes before 30?

What number comes after 49?

Tristan has 1 apple. Ben gives him two apples. How many apples does he have now?

Yves has 2 apples. He eats 2 of his apples. How many apples does he have now?

Peter wants to count to 30. He starts from 1. He accidentally skips over the number 20. How many numbers did he say when he got to 30?

What number is 2 before 21?