If you're experiencing a roadblock with one of the Manhattan Prep GMAT math strategy guides, help is here!
The MonicaA374
Course Students
 
Posts: 2
Joined: Sun Sep 24, 2017 10:10 am
 

Math Foundation

by The MonicaA374 Wed Oct 04, 2017 5:15 pm

Hello! I just started studying the Math Foundations Book...I checked answer but I do not but I do not seem to understand...
Check your skills...Page #15
2/7 = 2 x ___?
Sage Pearce-Higgins
ManhattanGMAT Staff
 
Posts: 943
Joined: Thu Apr 03, 2014 4:04 am
 

Re: Math Foundation

by Sage Pearce-Higgins Sun Oct 08, 2017 7:14 am

Perhaps the symbols are confusing you here. Question 14 is asking: "2 divided by 7 is equal to 2 multiplied by BLANK; what is BLANK?". Now, 2 divided by 7 is the fraction 2/7. So we can make an equation 2/7 = 2 x BLANK. The missing number BLANK is 1/7.

In the explanations it mentions the word "reciprocal", which just means "1 divided by a number". I.e. the reciprocal of 2 is 1/2, and the reciprocal of y is 1/y. So you can see that "divided by 7" is the same as "multiplied by 1/7", i.e "divided by x" is the same as "multiplied by the reciprocal of x".

Have you watched the Foundations of Math workshops?
EANYU
Course Students
 
Posts: 1
Joined: Wed Oct 11, 2017 5:29 pm
 

Re: Math Foundation

by EANYU Sun Oct 15, 2017 5:31 pm

I am having difficulty understanding the solution to this problem as well. There are currently no available Foundations of Math workshops. Is it possible to gain access to a previous workshop ?
Sage Pearce-Higgins
ManhattanGMAT Staff
 
Posts: 943
Joined: Thu Apr 03, 2014 4:04 am
 

Re: Math Foundation

by Sage Pearce-Higgins Thu Oct 19, 2017 3:45 pm

In the Student Center, go to Foundation of Math, then click the tab for "Workshop Resources" and you should see Recordings of the Foundations of Math Workshops.