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Source: — Problem Solving |
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by sudhir3127 » Sat Aug 09, 2008 8:56 pm
Please search on the forum..its been answered several times..
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by raunekk » Sat Aug 09, 2008 9:02 pm
taking common

10^2(10^6 -1)/10^3(10^4 - 1)

1 is of very less value in comparison to 10^6 and 10^4
neglecting 1

10^6* 10^2/ 10^3 * 10^4

=10

thx
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by smclean23 » Sun Aug 10, 2008 6:42 pm
How would I know on G day to get the most common instead of doing the most often way of


10^8-10^2/10^7-10^3=

10^6/10^4=

10^2

Guess my question is, what stands out in the question for you to know to solve it using the most common?
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by Senator 153 » Sun Aug 10, 2008 6:58 pm
smclean: 10^8 - 10^2 does not equal 10^6. You've just divided instead of subtracted :)

To demonstrate:
10^8 - 10^2 = 100000000 - 100 = 99999900.
whereas
10^8 divided by 10^2 = 100000000 / 100 = 1000000, or 10^6.

What you want to do instead is factor the exponents of 10 ("pull out the tens").
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by smclean23 » Mon Aug 11, 2008 2:18 pm
Absolutely right.....I understand where I made the mistake....THANKS!
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