Topic 4 - Numbers and Indices

A prime number

• has only 1 factor

• has more than 2 factors

• has exactly 2 factors: 1 and the number itself

is 3 prime number or composite number?

• prime

• composite

What is the HCF of 18 and 24?

• 3

• 6

• 8

• 9

What is the LCM of 4 and 12? 

• 4
• 8
• 12
• 16

Use a factor tree to find the prime factorisation of 168

What are the missing factors?

• 2 and 3

• 3 and 6

• 3 and 3

• 1 and 9

Sum of all composite numbers between 25 and 30.

Write 6 x 6 x 6 in index form.

• 6³

• 216

• 3 x 6

• 3⁶

Write in index notation. 7 x 7 x 7 x 7 x 7 x 10

• 7⁵+ 10
• 7⁵x 10
• 7⁵x 10¹

Which is the base and which is the exponent? 5²

• 5 is base and 2 is exponent

• 5 is base and exponent

• 2 is base and 5 is exponent

• 2 is base and exponent