**1. What is the next natural number after 8?**

a) 12

b) 14

c) 9

d) 11

**Answer: **c) 9

**Explanation:** The next natural number after 8 is 9.

**2. What is the sum of the first 10 natural numbers?**

a) 55

b) 14

c) 45

d) 11

**Answer: **a) 55

**Explanation:** The sum of the first 10 natural numbers is 55 (1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 + 10).

**3. What is the product of the first 5 natural numbers?**

a) 140

b) 120

c) 90

d) 11

**Answer: **b) 120

**Explanation:** The product of the first 5 natural numbers is 120 (1 x 2 x 3 x 4 x 5).

**4. What is the difference between the square of the fourth natural number and the fourth natural number?**

a) 12

b) 14

c) 9

d) 11

**Answer: **a) 12

**Explanation:** The fourth natural number is 4 and the square of 4 is 16. The difference between 16 and 4 is 12.

**5. What is the smallest natural number that is divisible by both 6 and 8?**

a) 22

b) 24

c) 29

d) 21

**Answer:** b) 24

**Explanation:** The smallest natural number that is divisible by both 6 and 8 is 24.

**6. What is the largest natural number that is a factor of both 24 and 36?**

a) 11

b) 14

c) 19

d) 12

**Answer: **d) 12

**Explanation:** The largest natural number that is a factor of both 24 and 36 is 12.

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

a) 12

b) 14

c) 9

d) 11

**Answer:** a) 12

**2. Which of the following is a natural number?**

a) -3

b) 0

c) 5

d) 1/2

**Answer:** c) 5

**3. What is the product of the first 4 natural numbers?**

a) 20

b) 24

c) 60

d) 45

**Answer:** b) 24

**4. What is the difference between the sum of the cubes and that of squares of the first 10 natural numbers?**

a) 2190

b) 2640

c) 3110

d) 3420

**Answer:** b) 2640

**5. How many factors does the number 15 have?**

a) 2

b) 4

c) 6

d) 8

**Answer:** b) 4

**6. What is the greatest common divisor of 24 and 40?**

a) 8

b) 12

c) 24

d) 36

**Answer:** a) 8

**7. Is the number zero a natural number?**

a) True

b) False

c) Cannot be determined

d) None of the above

**Answer:** b) False

**8. What is the sum of the first seven natural numbers?**

a) 28

b) 32

c) 36

d) 40

**Answer:** a) 28

**9. How many even numbers are there between 50 and 100 (both inclusive)?**

a) 25

b) 26

c) 27

d) 28

**Answer:** b) 26

**10. How many odd numbers are there between 20 and 30?**

a) 5

b) 6

c) 7

d) 8

**Answer:** a) 5

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