book Maths Puzzle Numerical Ability

What is the value of y^3+y^3 ?
is it 2y^3 or y^6?

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book Other Question

Members of the Computer Club were assessed equal amounts to raise $1200 to buy some software. When 8 new members joined, the per-member assessmetn was reduced by $7.50. What was th how do u turn a decimal into a percentage?