book Maths Puzzle Numerical Ability

Denchin Donuts sells donuts for 20 cents each plus 15 cents for the box in which they come. Build a table

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book Other Question

Find two consecutive negitive intigers whose product is 90.
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Kerri, Ethan, and Jerry assembled a puzzle together in 40 hours. If Ethan worked twice as fast as Jerry and Kerri worked just as fast as Ethan, then how long would it have taken J