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 Question 1 What is the 50% of 2.5 × 10−4? A. 1.25 × 10−2 B. 2.25 × 10−4 C. 1.25 × 10−4 D. 5.0 × 10−2
 Question 2 0.0001 × 3.23 × 10−2 = ________ A. 3.23 × 10+2 B. 3.23 × 10+4 C. 323.0 × 10−6 D. 3.23 × 10−6
 Question 3 A 2.3 × 10−3 cm long nano fiber is divided into 100 parts. What is the length of a divided part? A. 2.3 × 10−2 cm B. 2.3 × 10−5 cm C. 2.3 × 10−6 cm D. 0.23 × 10−5 cm
 Question 4 Old semiconductor technology was capable of producing 90 × 10−9 m wide lines. Latest technology has further reduced the width by 50%. How wide lines can be produced now? A. 45 × 10−9 m B. 90 × 10−9 m C. 2.5 × 10−9 m D. 35 × 10−9 m
 Question 5 Light takes about 5.4 × 10−6 seconds to travel one mile in a vacuum. How long will it take the light to travel only one twentieth of a mile? A. 5.4 × 10−7 seconds B. 2.7 × 10−7 seconds C. 2.7 × 10−6 seconds D. 2.7 × 10−5 seconds
 Question 6 4.5 × 10−7 × 2.0 × 10+4 = __________ A. 3.5 × 10−11 B. 3.5 × 10−3 C. 9.0 × 10−3 D. 9.0 × 10−28
 Question 7 What is two seventh of 2.8 × 10−6? A. 4.0 × 10−7 B. 0.8 × 10−6 C. 8.0 × 10−7 D. 8.0 × 10−6
 Question 8 A strobe light flashes for one microsecond and then pauses for one microsecond in one flash cycle. Calculate time to complete 10,000 cycles? one microsecond = 10−6 second, one millisecond = 10−3 second. A. 20 millisecond B. 1 millisecond C. 100 microsecond D. 20 microsecond
 Question 9 What is 6% of 3.9 × 10−4? A. 2.34 × 10−3 B. 2.34 × 10−7 C. 2.34 × 10−5 D. 2.34 × 10−6
 Question 10 What is two-third of 60% of 5.7 × 10−8? A. 1.14 × 10−9 B. 3.42 × 10−8 C. 2.28 × 10−9 D. 2.28 × 10−8
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