exam Maths Puzzle Numerical Ability

The sequence 2,3,5,6,7,10,... consists opf all natural numbers which are neither perfect squares nor perfect cubes. Find the 75th term of this sequence?

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exam Other Question

I am having a problem solving this linear equation. A college student drives at 95km/h from home to a park and 70km/h from the park back to home. If the round-trip takes 45 minutes, how long does it take from the park back to home? The total profit (in dollars) for sales of x rowing machines is given by P(x) = 0.2 x^2 + 300x - 200. What is the profit if 500 are sold? For what value of x will the profit be at a maximum?