(1/10)18-(1/10)20=?

1. (1/10)18-(1/10)20=?
0.9
99/10
99/1020
None of the above

Ans: 99/1020

2. The human brain weighs about?
1 pound
3 pounds
6 pounds
4 pounds

Ans: 3 pounds

3. What does NASA stands for?
National Aeronautics and Space Aeronautics
National Airforce and Space Administration
National Aeronautics and Solar Administration
National Aeronautics and Space Administration

Ans: National Aeronautics and Space Administration

4. What is the name of the force holding us to the Earth?
Buoyant Force
Friction
Upthrust
Gravity

Ans: Gravity

5. To whom Nobel Prize in Peace for the year 2010 was awarded?
Liu Xiaobo
Barack H. Obama
Albert Arnold
Martti Ahtisaari

Ans: Liu Xiaobo

6. What were the first false teeth made from?
Porcelain
Ivory
Plastic
acrylic resins

Ans: Ivory