(a(i))[1]
Find the value of $\sqrt{19044}$.
(a(ii))[1]
Find the value of the expression $2^7$.
(b)[4]
Find the value of $n$ in each case when (i) it is a multiple of 45, (ii) it is a square number, (iii) it is a factor of 402, and (iv) it is a cube number.
(c)[2]
Work out $\dfrac{21 - 15 \times 3}{18 \div 6 - 4}$.
(d)[2]
Estimate the value of $\dfrac{19.2 \times \sqrt{8.64}}{31.6 \div 6.32}$ by rounding every number in the calculation to 1 significant figure. Show all your working by completing the calculation below.