Identifying the missing elements in a pattern and number sentence

What is the missing number in the pattern: 2, 4, _, 8, 10?

• 5

• 3

• 6

• 7

Fill in the missing number: 15, _, 21, 24, 27

• 22

• 18

• 20

• 25

Complete the pattern: 5, 10, _, 20, 25

• 15

• 12

• 7

• 18

What number is missing in the sequence: 3, 6, 9, _, 15?

• 10

• 18

• 13

• 12

Fill in the missing number: 12, 16, _, 24, 28

• 20

• 26

• 18

• 22

What is the missing number in the pattern: 50, 45, _, 35, 30?

• 40

• 20

• 25

• 15

Complete the pattern: 7, 14, _, 28, 35

• 21

• 42

• 10

• 20

What number is missing in the sequence: 18, 21, 24, _, 30?

• 25

• 32

• 27

• 28

Fill in the missing number: 40, 35, _, 25, 20

• 10

• 30

• 15

• 45

What is the missing number in the pattern: 9, 18, _, 36, 45

• 30

• 12

• 22

• 27