ππΌ Calculate the surface area of the 3D shape in the diagram below:

ππΌ A bag contains blue and red beads in the ratio 5:9. What fraction of the counters are red?

ππΌ Draw a Venn diagram to represent the following information: ΞΎ = {1,2,3,4,5,6,7,8,9,10,11,12,13}, A = { square numbers }, B = { cube numbers }

ππΌ Find P(AβͺB)

ππΌ . Work out the value of f^{-1}(10)