exam Maths Puzzle Numerical Ability

Find two consecutive integers whose product is 15 less than the square of the smaller number.

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exam Other Question

Compare equations with one variable to equations with two vari-ables. How are they alike? How are they different?

What if an equation had three variables? A radiator contains 6 liters of a 25% antifreeze solution. How much should be drained and replaced with pure antifreeze to produce a 33% antifreeze solution?