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<< back This is a SAMPLE test for Grade: 8, Subject: Math  
Test Topic(s): Number and Number Sense, Negative exponents and manipulation

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

 



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