Search found 35 matches
In the question, "How many machines of Type R were used?" do specify "Type R" to throw you off? The problem already says the same number of each type of machine was used so "Type R" and "Type S" should be the same, right? Essentially isn't this question asking...
- by coffee5251
Fri Feb 06, 2009 1:23 pm- Forum: Problem Solving
- Topic: Rate
- Replies: 7
- Views: 2096
- by coffee5251
Mon Feb 02, 2009 10:47 am- Forum: Problem Solving
- Topic: How to solve this question
- Replies: 11
- Views: 15575
Is this true for every number or just for the problem above?mals24 wrote:krisraam is right
Only if your denominator is in the form of 2^n, 5^n or 2^n*5^n then only will the number be a terminating decimal.
- by coffee5251
Mon Feb 02, 2009 7:06 am- Forum: Problem Solving
- Topic: terminating decimal
- Replies: 14
- Views: 3284
Is this true for every number or just for the problem above?mals24 wrote:krisraam is right
Only if your denominator is in the form of 2^n, 5^n or 2^n*5^n then only will the number be a terminating decimal.
- by coffee5251
Mon Feb 02, 2009 6:54 am- Forum: Problem Solving
- Topic: terminating decimal
- Replies: 14
- Views: 3284
Re: Just trying
x + 2y + z = 8 2x + y + z = 7 These two equations tell us that y-x = 1 Substituting for y in the first eq...we have x + 2(1+x) + z = 8 3x + z = 6 ------ (A) Now from (I), we have x,y and z are positive integers. Since x and z are positive, z will be > 0. For equation A to be true X cannot have a va...
- by coffee5251
Fri Jan 30, 2009 3:37 pm- Forum: Data Sufficiency
- Topic: Equations
- Replies: 5
- Views: 1490
Re: HCF /LCM
Out of curiosity does anyone know what level a problem like this is??nehakhas1 wrote:1. The HCF of three numbers is 12. Their product is 17280. What are the three numbers?
I. One of the numbers is greater than the other two.
II. One of the numbers is lesser than the other two.
Please solve
- by coffee5251
Fri Jan 30, 2009 7:15 am- Forum: Data Sufficiency
- Topic: HCF /LCM
- Replies: 7
- Views: 2934
Re: Norman window
A norman window consists of a retangle surmounted by a semicircle. Find the area of the norman window. How much wood fram is needed to enclose the window? L-6 W-4 I got the rectangle part of the proble... A=LW A=6*4=24 24+2Pi=30.28 How do I get the semicircle? Why do you add 2Pi to the area? How do...
- by coffee5251
Thu Jan 29, 2009 5:26 pm- Forum: Problem Solving
- Topic: Norman window
- Replies: 4
- Views: 5740
You could also test the answer choices. Take each answer choice (the current price of the towel) and divide it by 120. Then take each one again, add 1 for the price increase of $1 and then divide that number by 120. Then, see which two numbers have a difference of 10. for example, a: 120/1 = 120. th...
- by coffee5251
Wed Jan 28, 2009 5:55 pm- Forum: Problem Solving
- Topic: Word Trans (Alg Trans): A store currently charges the same p
- Replies: 5
- Views: 6571
- by coffee5251
Wed Jan 28, 2009 4:36 pm- Forum: Problem Solving
- Topic: PS tough question !
- Replies: 4
- Views: 2520
for such questions, why do we have to assume that all integers will be consecutive integers? why can't there be a repetition of some odd integers? the answer should be E. i don't understand how we've assumed that the integers between x and y are consecutive when this hasn't been mentioned in the qu...
- by coffee5251
Fri Jan 23, 2009 4:46 pm- Forum: Data Sufficiency
- Topic: Odd and Even
- Replies: 7
- Views: 2743
b. x<0, so that -x = 3x - 2. For this one you would have 4x = 2, with x =1/2. But 1/2 is not a negative, which means that the given equation has only one possible answer: x = 1. So I'd go with B. Hi, what do you mean when you say the given equation has only one possible answer : x=1? What does this...
- by coffee5251
Fri Jan 23, 2009 3:40 pm- Forum: Data Sufficiency
- Topic: tricky one
- Replies: 8
- Views: 1995
Re: Another number properties question
2x3x5x7 is not an integer together 2x2x3x5x7 = NO i 2x2x3x3x5x5x7x7 = YES Can you explain this? What do you mean by "2x3x5x7 is not an integer"? Also, if it says "k is divisible by exactly 4 prime numbers" does that mean they don't have to be distinct? (i.e. 2x2x3x3x5x5x7x7 is d...
- by coffee5251
Fri Jan 16, 2009 6:54 am- Forum: Data Sufficiency
- Topic: Another number properties question
- Replies: 11
- Views: 2390
Re: Another number properties question
2x3x5x7 is not an integer together 2x2x3x5x7 = NO i 2x2x3x3x5x5x7x7 = YES Can you explain this? What do you mean by "2x3x5x7 is not an integer"? Also, if it says "k is divisible by exactly 4 prime numbers" does that mean they don't have to be distinct? (i.e. 2x2x3x3x5x5x7x7 is d...
- by coffee5251
Fri Jan 16, 2009 6:51 am- Forum: Data Sufficiency
- Topic: Another number properties question
- Replies: 11
- Views: 2390
When you see a question like this, think factors find factors of 450 = 2 x 3 x 3 x 5 x 5 We know that 450Y = n^3 which means Y should atleast have 2 x 2 x 3 x 5 X N where N is of the form A^3 where A is an integer Y = 2^2 x 3 x 5 x A^3 Why is Y= 2^2 x 3 x 5 x A^3 if the prime factorization of 450 o...
- by coffee5251
Fri Jan 16, 2009 5:22 am- Forum: Problem Solving
- Topic: 450y - how to approach
- Replies: 12
- Views: 4795
Re: Problem on Multiples
(2) Fewer than 2 of the first 5 positive integer multiples of m are multiples of 12. m 2m 3m 4m 5m Fever than 2 = 1 so that would be m m is a multiple of 12 so it is a multiple of 6 Choose B Hi, maybe I'm not understanding the question, but why does m have to be a multiple of 12? What if m is 6, th...
- by coffee5251
Thu Jan 15, 2009 11:50 am- Forum: Data Sufficiency
- Topic: Problem on Multiples
- Replies: 8
- Views: 1783