What is the Pythagoras Equation?

a^2 + b^2 = c^2

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Dipen and Nisha are planning their wedding reception. Nisha says, “I want to invite 70 guests.” Dipen says, “If we invite one-fifth fewer guests, we will save more than £500” Is Dipen correct? (Taken from Nov 2014 AQA Unit 2)


Increase £190 by 25%


There are 14 boys in a class and 16 girls. The Mean height of the class is 1.6m, the mean of the girls is 1.5m what is the mean height of the boys?


b is two thirds of c. 5a = 4c Work out the ratio a : b : c Give your answer in its simplest form where a, b and c are integers