book Maths Puzzle Numerical Ability

Find two consecutive negitive intigers whose product is 90.
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A fish was caught whose tail weighed 9 pounds. His head weighed as much as his tail and half his body, and his body weighed as much as his head and tail. How much did the fish weigh? Denchin Donuts sells donuts for 20 cents each plus 15 cents for the box in which they come. Build a table