exam Maths Puzzle Numerical Ability

What is the composition of two funcions: basic

(g or r )(4)
(r or q )(4)

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exam Other Question

YOLANDA IS MAKING STAICASE SHAPES BY USING SQUARE TILES.HOW MANY TILES WILL SHE NEED TO MAKE A STAIRCASE THAT IS 10 TILES TALL? whoever is answering this question dont answer it please just tell me if i am doing it right
-2=7(q+2)+3(2q-1)
then
-2=7q+14+6q-3
then
im not sure about the rest though can you please help me