Numbers Quiz-1

Identify the irrational quantity.

• The length of the diagonal of a rectangle with sides 3cm and 4 cm

• The circumference of a circle having radius 1/π units

• The area of a circle having radius 1/π units

The number of factors of 231 is-

• 8

• 3

• 6

• 4

The number of prime factors of 231 is-

• 8

• 3

• 4

• 6

Choose the incorrect statement.

• All irrational numbers are real numbers.

• All natural numbers are integers.

• All decimals are rational numbers.

• All fractions are rational numbers.

Identify the rational number.

• π

The HCF of 32, 56 and 72 is-

• 2

• 4

• 8

• 2016

The LCM of 32, 56 and 72

• 2

• 4

• 8

• 2016

The difference between the HCF AND LCM OF 32, 56 and 72 is-

Which of the following is not a factor of 246?

• 41

• 3

• 2

• 81

Find the difference between the HCF and LCM of 25, 40 and 100.

• 200

• 195

• 80

• 45