Math Games

Archive for November, 2006

Question: Math Question HELP (please)?

During the 100 meter dash in 1988 Olympic Games in Seoul, Korea, Florence Griffin Joyner was timed at 0.91 seconds for 10 meters.
At this Speed, could she pass a car traveling 15 miles per hour in a school zone?

HINT: You must use conversion between units of measure to answer this question.

Try to SHOW all STEPS

Answer: 10 meters in .91 sec = 10 / .91 meters/second = 10.989 m/sec
1 m = 3.28 feet, so that's
10.989 * 3.28 = 36 ft/sec

1 mi = 5280 ft, 1 hr = 60 min, 1 min = 60 sec, so doing all the conversions at once:

15 mi/hr = 15 * 5280 feet / 3600 seconds ( 1 hr = 60 min * 60 sec) = 22 ft/sec

So, YES, she IS going faster than the car.

Multiplication Memory

Below are answers to division free Math Games. For questions on division free Math Games, click the link at the bottom of the page.

Answer to Division free math game 1

The second place winner drove at

(100 + 100 x 10%) mph = 110 mph.

The winner drove at (110 + 110 x 20%) = 132 mph.

Answer to Division free math game 2

The floor height is 9 feet, which is 9 x 12 = 108 in. One step is 9 inches high, so 108/9 = 12 steps are needed to go from one floor to the next.

Answer to Division free math game 3

The plane's average speed is 4,500 / 8 = 562.5 mph between the two cities.

Answer to Division free math game 4

15 ft. equals 15 x 12 = 180 inches, so there are 180/0.125 = 1,440 ants in line, assuming no separation between ants.

For answers to the above division free Math Games, click here.