We have four colors
so we have to frame the euatation like this
1*5*x*11=88000
=88*1000
=11*8*(25*4*10)
11*5^3*8^2*11
if we compare both LHS and RHS we have x=2
More Primes
-
tirupathirao
- Newbie | Next Rank: 10 Posts
- Posts: 2
- Joined: Sun Oct 16, 2011 10:14 am
It says that x is between 5 and 11, we also need to know what numbers can be broken down into primes.duongthang wrote:I can not understand why X can not be 10, Pleas, explain more on this
88,000 = (11)(10^3)(8) OR (11)(2*2*2*5*5*5)(2*2*2)
Since we know 5 is one of the chips, we can take 5 out of the equation, and then we are left with a number of 2s.
We also know x>5, so x must be 8 since we know there is only one additional chip and it cannot be greater than 11. IF the other chip was 10, we would be left with a number of 2's that are not part of the equation since there are 4 chips, none listed as 2.
-
immaculatesahai
- Senior | Next Rank: 100 Posts
- Posts: 90
- Joined: Thu Nov 05, 2009 9:14 am
- Thanked: 5 times
- Followed by:3 members
Ans: B (2chips)
Bag contains- Blue (1) Green (5) Purple (x) Red (11)
We know x>5, x<11.
Factorize 88000, you will get factors of 11,5,5,5,8,8. Hence the value of x is 8 and there are 2 purple chips.
There is the possibility of the value being 10, but dividing by 10 will also leave eventual remainder to 2 (which we dont want).
Simple problem.
Bag contains- Blue (1) Green (5) Purple (x) Red (11)
We know x>5, x<11.
Factorize 88000, you will get factors of 11,5,5,5,8,8. Hence the value of x is 8 and there are 2 purple chips.
There is the possibility of the value being 10, but dividing by 10 will also leave eventual remainder to 2 (which we dont want).
Simple problem.
-
nskandan
- Junior | Next Rank: 30 Posts
- Posts: 15
- Joined: Mon Oct 10, 2011 3:06 am
- Location: UK
- Thanked: 1 times
Please clarify this beginners doubt.Thang Do wrote:I think the short way should be:
As in the context:
(1^a).(5^b).(x^c).(11^d)=88000
a,b,c,d is the numbers of each colour chip.
So we have to find what is c.
To find c we need find x. We will break 88000 in to 1, 5, 11 as follows:
88000 = 88.1000 = 11.8.1000 = 11. 8. 5.5.5.8 = 11.8.8.5.5.5
So
(1^a).(5^b).(x^c).(11^d)=88000 = 5.5.5.8.8.11
Because 1.1.1...1 = 1 so we dont care what is "a".
as we know that 5<x<10 so x= 8 is reasonable.
Thus
5^b = 5.5.5 --->b = 3
x^c= 8^c = 8.8=8^2 ---> c = 2 -----> answer is B
11^d= 11---> d = 1
By this way we can find a,b,c,d
If b is number of pieces and 5 is the price per piece then net Value of chip should be 5*a . Why we are taking 5^a ?
NSK
-
Ramesh L.S.
- Newbie | Next Rank: 10 Posts
- Posts: 7
- Joined: Sun Nov 20, 2011 11:21 pm
Imagine I select 17596[ worth 87980 points]green chips,I am left with 20 points, in that i accomodate 1 Red chip, Now I am left with 9 points to accomodate, i will select 1 purple chip [worth 9 points, i.e. greater than 5 but less than 11], according to me answer is option A. please let me know if something is missing.
-
Ramesh L.S.
- Newbie | Next Rank: 10 Posts
- Posts: 7
- Joined: Sun Nov 20, 2011 11:21 pm
-
thunderdan
- Senior | Next Rank: 100 Posts
- Posts: 72
- Joined: Fri Aug 07, 2009 2:49 pm
- Thanked: 4 times
- GMAT Score:690
This is one of those questions, I will definitely guess and move on in the test. If you try to solve it thoroughly it will take a lot of time; which many of us do not have during the test.
- ronnie1985
- Legendary Member
- Posts: 626
- Joined: Fri Dec 23, 2011 2:50 am
- Location: Ahmedabad
- Thanked: 31 times
- Followed by:10 members
88000 = 8x11x1000
8=2^3
and 1000 = 10^3
The value of Purple chips can either be 2 or 4. If it is 2 then no of purple chips should be 6, but no such option is available. therefore the value of purple chip is 4 and the no of purple chips is 3.
Answer = (C)
8=2^3
and 1000 = 10^3
The value of Purple chips can either be 2 or 4. If it is 2 then no of purple chips should be 6, but no such option is available. therefore the value of purple chip is 4 and the no of purple chips is 3.
Answer = (C)
Follow your passion, Success as perceived by others shall follow you
-
gmattest001
- Junior | Next Rank: 30 Posts
- Posts: 19
- Joined: Tue Jan 31, 2012 1:41 am
- Thanked: 1 times
- Followed by:1 members
-
rajeev_ranjan
- Newbie | Next Rank: 10 Posts
- Posts: 1
- Joined: Fri Jun 25, 2010 2:39 am
i think the question should ask maximum no. of purple chips... as in the current scenario purple chips can be one and 8 blue chips.
pl correct me if i am wrong..
pl correct me if i am wrong..
The answer is B - 2 purple chips.
We shound use prime factorization to see how it works out:
88000 = 1000 * 11 * 8 = 2^3 * 5^3 * 11 * 2^3
Thus we see that there are 3 green chips and one red.
The purple one costs between 5 and eleven, so we can deduce that there are 2 purple chips at 8 points each!!!)))))))) Pretty easy )
We shound use prime factorization to see how it works out:
88000 = 1000 * 11 * 8 = 2^3 * 5^3 * 11 * 2^3
Thus we see that there are 3 green chips and one red.
The purple one costs between 5 and eleven, so we can deduce that there are 2 purple chips at 8 points each!!!)))))))) Pretty easy )
See my answer below
))
rajeev_ranjan wrote:i think the question should ask maximum no. of purple chips... as in the current scenario purple chips can be one and 8 blue chips.
pl correct me if i am wrong..
DONT FORGET that x is between 5 and 11. It can`t be 20)
And that 10^3 = (5*2)^3
And that 10^3 = (5*2)^3
ronnie1985 wrote:88000 = 8x11x1000
8=2^3
and 1000 = 10^3
The value of Purple chips can either be 2 or 4. If it is 2 then no of purple chips should be 6, but no such option is available. therefore the value of purple chip is 4 and the no of purple chips is 3.
Answer = (C)
-
prashantsarode
- Newbie | Next Rank: 10 Posts
- Posts: 4
- Joined: Fri Aug 03, 2007 5:18 am
- Location: Mumbai
88,000 = 11*5*5*5*2*2*2*2*2*2
means 88,000 = 11*5^3*2^3
As value of purple should be between 7 and 11 2^3 can be organised as 8*8.
Hence answer should be B i.e. 2
means 88,000 = 11*5^3*2^3
As value of purple should be between 7 and 11 2^3 can be organised as 8*8.
Hence answer should be B i.e. 2












