BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Real Easy for you - not me.

This topic has expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Legendary Member
Posts: 829
Joined: Mon Jul 07, 2008 10:09 pm
Location: INDIA
Thanked: 84 times
Followed by:3 members

by sudhir3127 » Sat Aug 09, 2008 8:56 pm
Please search on the forum..its been answered several times..
Top
Legendary Member
Posts: 1159
Joined: Wed Apr 16, 2008 10:35 pm
Thanked: 56 times

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
Top
Master | Next Rank: 500 Posts
Posts: 172
Joined: Mon Jun 23, 2008 12:00 pm
Thanked: 3 times
Followed by:1 members

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?
Top
Senior | Next Rank: 100 Posts
Posts: 35
Joined: Mon Jun 09, 2008 3:05 am
Thanked: 2 times

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").
Top
Master | Next Rank: 500 Posts
Posts: 172
Joined: Mon Jun 23, 2008 12:00 pm
Thanked: 3 times
Followed by:1 members

by smclean23 » Mon Aug 11, 2008 2:18 pm
Absolutely right.....I understand where I made the mistake....THANKS!
Top
Post new topic Post Reply
• Page 1 of 1