Thank you for using the timer!
We noticed you are actually not timing your practice. Click the START button first next time you use the timer.
There are many benefits to timing your practice, including:
Re: +ve single digits [#permalink]
31 Jan 2012, 18:23
This post received KUDOS
This post was BOOKMARKED
What is the three-digit number abc, given that a, b, and c are the positive single digits that make up the number?
(1) a = 1.5b and b = 1.5c --> a/b=3/2=9/6 and b/c=3/2=6/4 --> a/b/c=9/6/4 and as a, b, and c are the positive single digits, then a=9, b=6 and c=4 --> abc=964. Sufficient.
(2) a = 1.5x + b and b = x + c, where x represents a positive single digit --> multiple values are possible, for example: if x=2 then a=3+b and b=2+c --> abc can 631 (for c=1) be or 742 (for c=2). Not sufficient.
c=c b=1.5c , put value of b in given equation no.1 a=2.25c
n = 225c+25c+c = 241c .. we know c is an integer and in this case it can take four values from 1 to 4 .. for values greater than 4, "n" will become 5 digit number. now a=2.25c .. we know a is also an integer .. from the possible values of c we have i.e. 1,2,3,4 .. only 4 will make a an integer ..
hence, a = 2.25*4=9 b = 1.5*4=6 c = 4
n = 964
2) well, this one is easy just put values in 100a+10b+c .. you'll get 260x+110c .. too many possibilities _________________
Re: What is the three-digit number abc, given that a, b, and c [#permalink]
28 Oct 2014, 07:01
Hello from the GMAT Club BumpBot!
Thanks to another GMAT Club member, I have just discovered this valuable topic, yet it had no discussion for over a year. I am now bumping it up - doing my job. I think you may find it valuable (esp those replies with Kudos).
Want to see all other topics I dig out? Follow me (click follow button on profile). You will receive a summary of all topics I bump in your profile area as well as via email. _________________