WJEC GCSE Mathematics Number overview quiz quiz

Work out $-7 + 4 \times (-2)$.

Work out $-8 - (-5)$.

Write $90$ as a product of its prime factors.

Find the HCF of $24$ and $36$.

Work out $\tfrac{3}{4} + \tfrac{1}{6}$.

Work out $\tfrac{2}{3} \div \tfrac{4}{9}$.

Share GBP 350 in the ratio $3 : 4$.

A coat costing GBP 80 is reduced by $25\%$. What is the sale price?

GBP 500 is invested at $4\%$ compound interest per year. What is it worth after 2 years?

Write the recurring decimal $0.\dot{2}\dot{7}$ as a fraction in its simplest form.

Write $0.00042$ in standard form.

Work out $(6 \times 10^{5}) \div (2 \times 10^{2})$ in standard form.

Work out $25^{3/2}$.

Simplify $3^{-2}$.

Simplify $\sqrt{72}$ in the form $a\sqrt{b}$.

Estimate $\dfrac{41 \times 19}{0.5}$ by rounding to one significant figure.