Skip counting by 2, 5 and 10

Sam skips counts by 5's. 5, 10, 15, 25, 30. which no. did he forget?

• 20

• 15

Find the missing number: 10, ___, 30, 40, 50

• 15

• 20

25, 35, ________, 55

• 15

• 45

Choose the correct answer.

• 5, 15, 25, 30,35

• 5, 10, 15, 20, 25