Inventions Subtraction

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1 The parachute was invented in 1785 and the motorcycle was invented in 1885. What is the different between 1885 and 1785?
2 wpe20.gif (5851 bytes)The typewriter was invented in 1867 and the word processor was invented in 1965. what is the different between 1965 and 1867?
3 wpe2.gif (4276 bytes)The magnifying glass was invented 1250 and the space shuttle was invented in 1977.What is the different between 1977 and 1250?
4 If the zipper was invented 1801 and the food processor was invented in 1971, What was the difference between 1971 and 1801?
5 The X-ray was invented in 1895 and the steamboat was invented in 1807 What is the difference in years?
6 The helicopter was invented in 1939 and the escalator was invented 1891, What is the difference in years?
7 wpe3.gif (8829 bytes)The CD was invented in 1972 and the piano was invented in 1709 what is the time difference?
8 The vacuum was invented in 1907 and the ball point pen was invented in 1943. What is the time difference between 1907 and 1943?
9 wpe4.gif (3612 bytes)The lawn mower was invented in 1831 and the dishwasher was invented in 1886.  What is the time difference between 1886 and 1831?
10 wpe13.gif (2359 bytes)The television was invented in 1924 and the microwave oven was invented in 1947.  What is the time difference between 1947 and 1924?

   

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