Playing With Numbers

Two numbers having only _____ as a common factor are called co-prime numbers.

The smallest composite number is

• 1

• 2

• 3

• 4

Which of the following is smallest prime number:

• 1

• 4

• 2

• 3

Find the HCF of two consecutive number is always ____

• none of the above

• 3

• 0

• 1

The numbers having more than two factors are called

The numbers having only two factors are called

• prime numbers

• composite numbers

• odd numbers

• even numbers

Which are the five multiples of 6

• 6, 12, 18, 24, 30

• 6, 18, 25, 36, 42

• 6, 12, 18, 28, 30

• 6, 12, 18, 24, 40

The exact divisor of the number 9 is

Which number is factor of every number?

• 100

• 10

• 5

• 1

In which of the following prime factorisation has been done:

• 56 = 2x2x2x2x7

• 56 = 2x4x7

• 56 = 2x2x14

• 56 = 2x2x2x7