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Questions in Grade Middle-school

[Open]The completion times for three runners in a 100-yard dash are 9.75 seconds, 9.7 seconds, and 9.675 seconds. Which is the winning time?

[Open]A widescreen television measures 36 inches by 54 inches. A movie theater screen measures 42 feet by 63 feet. Are the screens similar? Explain.

[Open]How many different ways can 50 players in a marching band be arranged in rectangular arrangements?

[Open]Both 2 and 5 are common factors of a number. The number is between 101 and 118. What is the number? Give a reason for your answer.

[Open]What is one tenth of 80?

[Open]If marching bands vary from 21 to 49 players, which numbers of players can be arranged in the greatest number of rectangles?

[Open]Who discovered America: Christopher Columbus, Amerigo Vespucci, or Leif Ericsson? Explain who and why the other two are not credited with the discovery.

[Open]When 12 is subtracted from 3 times a number, the result is 24. What is the number?

[Open]Write 1.2% as a fraction or mixed number in simplest form.

[Open]An above-ground swimming pool is leaking. After \(\frac{1}{2}\) hour, the pool has leaked \(\frac{7}{8}\) of a gallon of water. How many gallons of water per hour is the swimming pool leaking?