Before taking part in the quiz make sure you have a pencil or pen and a piece of paper ready for writing down your answers - better still, print off our answer sheet below. Use your mental maths ...

Join Ralph van Dijk and side-kick Matrix for more questions to consolidate mental maths skills. The focus today is adding and subtracting two-digit numbers.

Fractions, often perceived as daunting, become manageable with the right approach. Addition and subtraction require finding a common denominator, while multiplication involves directly multiplying ...