Search found 41 matches
- by mariofelixpasku
Wed Mar 20, 2013 2:20 pm- Forum: Problem Solving
- Topic: geometry question
- Replies: 6
- Views: 19841
is there any shorter solution? it seems as if one would need more than 2 minutes to figure all this out ...
- by mariofelixpasku
Wed Mar 20, 2013 11:50 am- Forum: Data Sufficiency
- Topic: DS | Remainder when (x^2 + y^2) divided by 5 ?
- Replies: 8
- Views: 1913
- by mariofelixpasku
Fri Mar 15, 2013 6:35 am- Forum: Sentence Correction
- Topic: e
- Replies: 0
- Views: 788
Is the perimeter of rectangle R greater than 28? (1) Area of rectangle R is 50. (2) Diagonal of rectangle R is 10. Statement 1: LW = 50. Let's assume that the perimeter = 28. Then 2(L+W) = 28, L+W=14, and W=14-L. Substituting into LW=50, we get: L(14-L) = 50. 14L - L^2 -50 = 0. L^2 - 14L + 50 = 0. ...
- by mariofelixpasku
Thu Mar 14, 2013 3:34 pm- Forum: Data Sufficiency
- Topic: rectangle R greater
- Replies: 35
- Views: 16382
- by mariofelixpasku
Thu Mar 14, 2013 10:53 am- Forum: Problem Solving
- Topic: Percent
- Replies: 3
- Views: 1149
- by mariofelixpasku
Wed Mar 13, 2013 10:55 am- Forum: Problem Solving
- Topic: Combinations
- Replies: 4
- Views: 1052
- by mariofelixpasku
Thu Mar 07, 2013 1:40 pm- Forum: Problem Solving
- Topic: PS2
- Replies: 11
- Views: 8164
Working Problem (need help)
Working alone Thomas can do a job in 8 hours longer than if both Thomas and Kevin worked together. If Kevin worked alone, he would take 4.5 hours more to complete the job than when he works with Thomas. Which of the following could be the amount of hours if they work together? a) 4 b) 6 c) 8 d) 12 e...
- by mariofelixpasku
Thu Oct 25, 2012 4:00 pm- Forum: Problem Solving
- Topic: Working Problem (need help)
- Replies: 1
- Views: 1506
Sets
If 70 children go to the cinema for the afternoon and 40 watch Cinderella and 50 watch The Little Mermaid, how many watch both Cinderella and The Little Mermaid?
- by mariofelixpasku
Tue Oct 23, 2012 12:25 pm- Forum: Problem Solving
- Topic: Sets
- Replies: 1
- Views: 1006
- by mariofelixpasku
Tue Oct 23, 2012 7:29 am- Forum: Problem Solving
- Topic: Fraction
- Replies: 4
- Views: 1320
- by mariofelixpasku
Mon Oct 22, 2012 6:10 pm- Forum: Problem Solving
- Topic: probs.
- Replies: 2
- Views: 1041
probs.
There are 15 articles in a box, 5 of which are colored. If 5 articles are selected at random, what is the probability that one of the articles is not colored?
- by mariofelixpasku
Mon Oct 22, 2012 11:43 am- Forum: Problem Solving
- Topic: probs.
- Replies: 2
- Views: 1041
Probabilities
On an examination there are 25 different topics and only 3 questions. A student did not have enough time to prepare for 10 of the topics. What is the probability that he will be able to answer all three questions on the exam?
A: 91/120
- by mariofelixpasku
Mon Oct 22, 2012 11:29 am- Forum: Problem Solving
- Topic: Probabilities
- Replies: 1
- Views: 852
- by mariofelixpasku
Sat Oct 20, 2012 8:44 am- Forum: Problem Solving
- Topic: prime numbers
- Replies: 1
- Views: 947
- by mariofelixpasku
Sat Oct 20, 2012 6:15 am- Forum: Problem Solving
- Topic: Algebra (hard one in my opinion)
- Replies: 2
- Views: 842