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Question 1:
What is the 50% of 2.5 × 10−4?
	1.25 × 10−2		2.25 × 10−4
	1.25 × 10−4		5.0 × 10−2

Question 2:
0.0001 × 3.23 × 10−2 = ________
	3.23 × 10+2		3.23 × 10+4
	323.0 × 10−6		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?
	2.3 × 10−2 cm		2.3 × 10−5 cm
	2.3 × 10−6 cm		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?
	45 × 10−9 m		90 × 10−9 m
	2.5 × 10−9 m		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?
	5.4 × 10−7 seconds		2.7 × 10−7 seconds
	2.7 × 10−6 seconds		2.7 × 10−5 seconds

Question 6:
4.5 × 10−7 × 2.0 × 10+4 = __________
	3.5 × 10−11		3.5 × 10−3
	9.0 × 10−3		9.0 × 10−28

Question 7:
What is two seventh of 2.8 × 10−6?
	4.0 × 10−7		0.8 × 10−6
	8.0 × 10−7		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.
	20 millisecond		1 millisecond
	100 microsecond		20 microsecond

Question 9:
What is 6% of 3.9 × 10−4?
	2.34 × 10−3		2.34 × 10−7
	2.34 × 10−5		2.34 × 10−6

Question 10:
What is two-third of 60% of 5.7 × 10−8?
	1.14 × 10−9		3.42 × 10−8
	2.28 × 10−9		2.28 × 10−8