Simple Math Riddles
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An old auto is to drive a stretch of 2 miles, up and down a hill. Because the auto is so old, you cannot drive the first mile (the ascent) faster than 15 miles per hour.
How fast do you have to drive the second mile (going down the hill) in order to get an average speed of 30 miles per hour?
Select 3 balls and put them into the circles such that the sum of the numbers on them add up to 30.
Move one match stick to fix the equation
Post your solutions in the comments!