Counting by Sixes and Sevens

What is the next number in the sequence: 0, 6, 12, 18, ...?

• 36

• 30

• 20

• 24

What is the next number in the sequence: 7, 14, 21, 28, ...?

• 35

• 49

• 42

• 30

What is the missing number in the sequence: 0, 6, 12, __, 24, 30?

• 25

• 20

• 18

• 15

What is the missing number in the sequence: 7, 14, __, 28, 35, 42?

• 21

• 36

• 49

• 28

What is the 10th number in the sequence: 0, 6, 12, 18, ...?

• 54

• 36

• 30

• 24