1. When was barb wire patented?

A. 1874
B. 1840
C. 1895
D. 1900
Answer:  A

2. What Galileo invented?

A. Barometer
B. Pendulum clock
C. Microscope
D. Thermometer
Answer:  D

3. Who had an explosive idea and first patented DYNAMITE?

A. J. R. Gluber
B. A. Nobel
C. G. Fawks
D. W. Bickford
Answer:  B

4. Where was the yo-yo invented?

A. France
B. United States
C. Philippines
D. England
Answer:  C

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