myTestBook.com Math Reading Science Practice Test for Grade 1, 2, 3, 4 & 5    
  you are taking the following test:

 
Grade: 8,    Subject: Math,    Topic: Number and Number Sense Negative exponents and manipulation
Question 1:
What is the 50% of 2.5 × 10−4?

1.25 × 10−22.25 × 10−4

1.25 × 10−45.0 × 10−2
 
Question 2:
0.0001 × 3.23 × 10−2 = ________

3.23 × 10+23.23 × 10+4

323.0 × 10−63.23 × 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 cm2.3 × 10−5 cm

2.3 × 10−6 cm0.23 × 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 m90 × 10−9 m

2.5 × 10−9 m35 × 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 seconds2.7 × 10−7 seconds

2.7 × 10−6 seconds2.7 × 10−5 seconds
 
Question 6:
4.5 × 10−7 × 2.0 × 10+4 = __________

3.5 × 10−113.5 × 10−3

9.0 × 10−39.0 × 10−28
 
Question 7:
What is two seventh of 2.8 × 10−6?

4.0 × 10−70.8 × 10−6

8.0 × 10−78.0 × 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 millisecond1 millisecond

100 microsecond20 microsecond
 
Question 9:
What is 6% of 3.9 × 10−4?

2.34 × 10−32.34 × 10−7

2.34 × 10−52.34 × 10−6
 
Question 10:
What is two-third of 60% of 5.7 × 10−8?

1.14 × 10−93.42 × 10−8

2.28 × 10−92.28 × 10−8
 
  Login to "Submit and Check Answers"
Sponsered Artist: Juhi at JuhiMusic.com   

Copyright © 2005 - 2012 myTestBook.com Inc. All rights reserved.
Contents of myTestBook.com can not be copied for another website or for any other kind of publication.