exam Maths Puzzle Numerical Ability

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

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what is the price $900 and goes up by 17%, what is the new price? 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?