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Question 1
(1.4 × 106) × (1.2 × 103) = __?__
A. 2.6 × 109B. 2.6 × 104
C. 1.7 × 109D. 1.7 × 1018
Question 2
(4.5×105) ÷ (1.5×103) = __?__
A. 3 × 108B. 3 × 102
C. 3 × 1015D. 3 × 104
Question 3
(2 × 103)(3 × 104) = __?__
A. 5 × 107B. 6 × 101
C. 6 × 1012D. 6 × 107
Question 4
The smallest known star in the universe is OGLE-TR-122b. It has a diameter of 8.29 × 103 km. The largest known star in the universe, VY Canis Majoris, is about 1.67 × 105 times larger than OGLE-TR-122b. What is the diameter of VY Canis Majoris?
A. 2.38 × 109 kmB. 1.38 × 109 km
C. 1.38 × 1011 kmD. 7.3 × 107 km
Question 5
There are 3.2×108 virus in a sample vile. How many total number of virus will there be in 5,000 such vile?
A. 16×108B. 16.0×1012
C. 1.6×1012D. 1.6×1011
Question 6
= __?__
A. 4 × 107B. 4 × 1012
C. 4 × 10−1D. 4 × 101
Question 7
Find the quotient.

360,000,000 ÷ 0.0008
A. 4.5 × 1010B. 4.5 × 1011
C. 4.5 × 1012D. 4.5 × 109
Question 8
Size of a Helium atom is 62 pico meter. If 105 Helium atoms are placed in a straight line, how long line will it make? (1 pico meter = 10−12 meter)
A. 6.2 × 10−17 meterB. 6.2 × 10−7 meter
C. 62 × 10−6 meterD. 6.2 × 10−6 meter
Question 9
Weight of a Hydrogen atom is 1.66 × 10−27 kg. How many Hydrogen atoms are there in a container that has 8.3 × 10−3 kg of Hydrogen?
A. 5 × 1024 atomsB. 5 × 10−24 atoms
C. 5 × 1027 atomsD. 5 × 1030 atoms
Question 10
(2 × 10 -3) (2 × 108) = __?__
A. 4 × 105B. 4 × 1011
C. 4 × 10−5D. 4 × 106
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