Class VIII

Ralph Samuelson was only 18 when he invented this sporting item in 1922. What was that?
  1. Golf tee
  2. Motorboat
  3. Water skis
  4. Hang glider
What J. B. Dunlop invented?
  1. Pneumatic rubber tire
  2. Automobile wheel rim
  3. Rubber boot
  4. Model airplanes
What Igor Sikorsky invented?
  1. Hydroplane
  2. Jet engine airplane
  3. Helicopter
  4. Glider
Who had an explosive idea and first patented DYNAMITE?
  1. J. R. Gluber
  2. A. Nobel
  3. G. Fawks
  4. W. Bickford
When was barb wire patented?
  1. 1874
  2. 1840
  3. 1895
  4. 1900
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