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One number is 16 more than another. If the smaller number is subtracted from two thirds of the larger number, the result is one fourth of the sum of the two numbers. Find the numbers.

Yvonne biked for 1 1/4 hours and traveled 12 1/2 miles. How many miles per hour did she average?

Find a counterexample to the statement “The square of a number added to the sum of the number and five is a prime number.”