exam Maths Puzzle Numerical Ability

In a middle school it has 500 lockers, all are closed. Five hundred students start down the hall. The fist student opens every locker. The second student closes all lockers that ar

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Next year, Lyle will be twice as old as Sean will be. Four years ago, he was three times as old as Sean was. How old is each? Factor each polynomial completely. To begin, state which method should be applied as the first step, given the guidelines of this section. Then continue the exercise and factor each polynomial completely.

2p -6q + pq - 3q^2