Solved Questions on Natural Numbers
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.
Practice Questions on Natural Numbers
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
