book Maths Puzzle Numerical Ability

While at the park, I saw boys and dogs. Counting heads, I got 32. Counting legs, I got 104. How many boys and dogs were there?

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The rate r at which a disease spreads in a population of size P is jointly proportional to the number x of infected people and the number P-X who are not infected. An infection er Solve the following problem and include the steps you use to solve the problem.

Rose's garden is a square with sides of length x feet. Next spring she plans to make it rectangul