1. What is the next number in the sequence: 2, 4, 6, 8, 10?

Answer: 12

2. What is the missing number in the sequence: 1, 4, 9, 16, __?

Answer: 25

3. What is the next number in the sequence: 1, 3, 6, 10, 15?

Answer: 21

4. What is the missing number in the sequence: 2, 4, 8, 16, __?

Answer: 32

5. What is the next number in the sequence: 1, 4, 9, 16, 25?

Answer: 36

6. What is the missing number in the sequence: 1, 3, 6, 10, __?

Answer: 15

7. What is the next number in the sequence: 2, 6, 12, 20, 30?

Answer: 42

8. What is the missing number in the sequence: 1, 4, 8, __, 32?

Answer: 16

9. What is the next number in the sequence: 1, 5, 10, 16, 23?

Answer: 31

10. What is the missing number in the sequence: 1, 3, 7, __, 15?

Answer: 11