Search found 5 matches
For those who are not familiar with equation of circle, it can be worked out simply by using distance between two points formula to find out and match the radius of the circle with center origin. (r^2 + 0^2)^2 + (s^2 + 0^2)^2 = radius^2 => r^2 + s^2 = radius^2 So we just need the radius to solve thi...
- by mishelk
Mon Jul 18, 2011 10:37 pm- Forum: Data Sufficiency
- Topic: Radius of acircle.
- Replies: 14
- Views: 9273
Anthony and Cindy were each given X dollars in advance for each day they were expected to perform at a community festival. Anthony eventually perfromed on all 14 days of the festival, while Cindy performed on 4 fewer days than Anthony performed. If Cindy gives Anthony y dollars of her advance payme...
- by mishelk
Mon Jul 18, 2011 10:20 pm- Forum: Problem Solving
- Topic: Integers. Word Problem
- Replies: 15
- Views: 11875
We can look at the problem in two different ways... Minimum Purchases/Gallons: White Paint Requirement = (3/8)*2 = 3/4 = 0.75 gallons Black Paint Requirement = (5/8)*2 = 5/4 = 1.25 gallons If we consider purchase of minimum gallons of paint.. - 1 gallon of white paint would suffice. - 1.5 gallons of...
- by mishelk
Sun Jun 19, 2011 2:15 am- Forum: Problem Solving
- Topic: Mixture Prob
- Replies: 33
- Views: 18423
There are definitely multiple ways... just adding another method to solve the problem.. :) Area of Eq. Triangle = 9√3 = side²*(√3)/4 side = 6 Considering the side of the eq. triangle and the diameter (and other side being the perpendicular bisector extended to the circumference forming a 90° a...
- by mishelk
Wed Jun 15, 2011 12:27 am- Forum: Problem Solving
- Topic: equilateral triangle pS
- Replies: 61
- Views: 34590
the most imporatnt concept here os prime* prime = non prime 5*5 = 25 7*7 = 49 prime - nonprime = prime 17-12 =5 prime + prime = nonprime more than working with numbers work with teh concept "prime - nonprime = prime" Is not always true, for example, 97 - 12 = 85 (non-prime). It could be t...
- by mishelk
Thu May 19, 2011 2:47 am- Forum: Problem Solving
- Topic: problem with prime numbers
- Replies: 8
- Views: 1842