MIRACLE IGCSE MATHS REVISION

Find the HCF of 12 and 16...

• 2

• 4

• 6

• 8

Find the LCM of 12 and 16...

• 48

• 36

• 64

• 96

List the first 5 multiples of 3

• 3, 6 10, 15, 20
• 1, 3
• 3, 6, 9, 12, 15
• 6, 9, 12, 15, 18

A prime number is...

• a number that has only one factor.
• a number that has at least two factors.
• a number that has more than two factors.
• a number that has only two factors.
  (1 and itself)

write 140 as the product of its prime factors

• 2x2x5x7

• 2x2x2x2

• 3x2x3x5

• 7x9x5x2

Which is a factor of 15?

• 2
• 3
• 4
• 6

Which of the following numbers is not composite?

• 24

• 40

• 66

• 61

Find the HCF of 32 and 80.

• 8

• 16

• 24

• 32

A number is expressed as

2³ x 3³ x 5.

What is the number?

• 11

• 72

• 270

• 1080

What is a rational number ?

• A rational number  is a number that cannot be written as a fraction.
• A rational number is a number that can be written as a fraction.
• A rational number cannot be a repeating  decimal.