Number

find the prime factorisation of 45 and 60. Use the answer to fin the HCF.

find the prime factorisation of 45 and 60. Use the answer to fin the HCF.

45→5 x 3² 60→5 x 3 x 2²

HCF = 15

If w = 2² x 3 x 5 then find the prime factorisation of 36w

5 x 3³ x 2⁴

2/12 ÷ 3/7 =?

7/18

A bike has a two digit lock from 1→9. How many possible combinations are there?

81

How many possible ways can you order the numbers

1, 5, 6, 7, 5

120

A three digit lock has number 3→8 including 3 and 8. How many possible combinations can be made without repeating a number?

120

find (5/4)⁻⁴

256/625

find (7/11)⁻⁴

14641/2401