## Number System MCQ

Which of the following is a prime number?

a) 12

b) 17

c) 22

d) 30

Answer: b) 17

Which of the following is a composite number?

a) 11

b) 13

c) 17

d) 21

Answer: d) 21

What is the smallest whole number?

a) 0

b) 1

c) 2

d) -1

Answer: b) 1

Which of the following is an odd number?

a) 10

b) 15

c) 20

d) 24

Answer: b) 15

Which of the following is a multiple of 5?

a) 18

b) 22

c) 25

d) 30

Answer: c) 25

What is the largest prime number less than 10?

a) 5

b) 7

c) 9

d) 11

Answer: b) 7

What is the unit digit of the square of any even number?

a) 0

b) 1

c) 4

d) 6

Answer: c) 4

What is the sum of the first five prime numbers?

a) 10

b) 15

c) 18

d) 28

Answer: d) 28

What is the remainder when 17 is divided by 5?

a) 0

b) 1

c) 2

d) 3

Answer: d) 3

Which of the following is a perfect square?

a) 27

b) 36

c) 45

d) 50

Answer: b) 36

What is the product of any number multiplied by 0?

a) 0

b) 1

c) The number itself

d) The number plus 1

Answer: a) 0

What is the next prime number after 29?

a) 31

b) 32

c) 33

d) 34

Answer: a) 31

What is the largest prime factor of 24?

a) 2

b) 3

c) 4

d) 5

Answer: b) 3

What is the sum of the first five natural numbers?

a) 5

b) 10

c) 15

d) 20

Answer: b) 10

Which of the following is a factor of 48?

a) 7

b) 12

c) 25

d) 36

Answer: b) 12

What is the smallest multiple of 9?

a) 18

b) 27

c) 36

d) 45

Answer: b) 27

What is the square root of 144?

a) 10

b) 12

c) 14

d) 16

Answer: b) 12

What is the sum of the digits of 325?

a) 10

b) 12

c) 15

d) 20

Answer: c) 10

What is the value of 7² – 5³?

a) -8

b) 8

c) 18

d) 24

Answer: a) -8

What is the remainder when 52 is divided by 6?

a) 0

b) 1

c) 2

d) 4

Answer: c) 2

What is the smallest prime number greater than 20?

a) 23

b) 26

c) 29

d) 31

Answer: a) 23

What is the product of any number multiplied by 1?

a) 0

b) 1

c) The number itself

d) The number plus 1

Answer: c) The number itself

What is the next composite number after 19?

a) 20

b) 21

c) 22

d) 23

Answer: b) 21

What is the value of 4! (factorial of 4)?

a) 6

b) 12

c) 24

d) 48

Answer: c) 24

What is the sum of the first ten natural numbers?

a) 45

b) 50

c) 55

d) 60

Answer: c) 55

What is the largest factor of any number?

a) 0

b) 1

c) The number itself

d) The number plus 1

Answer: c) The number itself

What is the product of any number multiplied by 10?

a) 0

b) 1

c) The number itself

d) The number plus 1

Answer: c) The number itself

What is the value of 2³ × 3²?

a) 18

b) 24

c) 36

d) 54

Answer: b) 24

What is the remainder when 75 is divided by 4?

a) 0

b) 1

c) 2

d) 3

Answer: c) 3

What is the square root of 169?

a) 10

b) 12

c) 13

d) 15

Answer: c) 13