exam Maths Puzzle Numerical Ability

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?

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exam Other Question

Suppose that a school has 1000 lockers and that they are all closed. A person
passes through, opening every other locker, beginning with locker 2. Then another person passes throu 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?