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By the way Mike, I followed the link to the Magoosh site and did not see that OA and OE to this question. Dear Marty, I'm sorry --- the BTG system automatically curtailed the URL, and the curtailed URL misdirected readers to another blog. Not the most adept design. I corrected the link in the post ...
- by Mike@Magoosh
Mon Dec 22, 2014 5:31 pm- Forum: Problem Solving
- Topic: In the diagram above, BD = 5, CD = 10, and AE = 40. What is
- Replies: 6
- Views: 2925
BDC and AEC are similar triangles. AE is 40 and BD is 5, so the larger triangle is 8 times the area of the smaller one. The area of BDC is 5 x 10/2 = 25 Therefore AEC has area 25 x 8 = 200 200-25 = 175 Answer A Dear Mathsbuddy , My friend, remember that when lengths are scaled up by, say, a scale f...
- by Mike@Magoosh
Fri Dec 19, 2014 8:20 am- Forum: Problem Solving
- Topic: In the diagram above, BD = 5, CD = 10, and AE = 40. What is
- Replies: 6
- Views: 2925
In the diagram above, BD = 5, CD = 10, and AE = 40. What is
http://s3.postimg.org/rrgvp2rgf/similar_triangle_diagram.jpg In the diagram above, BD = 5, CD = 10, and AE = 40. What is the area of the shaded region? (A) 175 (B) 350 (C) 775 (D) 1150 (E) 1575 For a set of practice problems on Similar Geometric Figures, as well as the OA & OE for this particul...
- by Mike@Magoosh
Thu Dec 18, 2014 2:29 pm- Forum: Problem Solving
- Topic: In the diagram above, BD = 5, CD = 10, and AE = 40. What is
- Replies: 6
- Views: 2925
Points J (3, 1) and K (– 1, – 3) are two vertices of an
Points J (3, 1) and K (– 1, – 3) are two vertices of an isosceles triangle. If L is the third vertex and has a y-coordinate of 6, what is the x-coordinate of L ? (A) –3 (B) –4 (C) –5 (D) –6 (E) –7 For a collection of Coordinate Geometry practice problems, as well as for the OA & O...
- by Mike@Magoosh
Mon Dec 08, 2014 2:59 pm- Forum: Problem Solving
- Topic: Points J (3, 1) and K (– 1, – 3) are two vertices of an
- Replies: 4
- Views: 2028
The center of circle Q is on the y-axis, and the circle pass
The center of circle Q is on the y-axis, and the circle passes through points (0, 7) and (0, –1). Circle Q intersects the positive x-axis at (p, 0). What is the value of p? (A) 7/3 (B) 4 (C) 5 (D) sqrt(7) (E) sqrt(11) For a set of Coordinate Geometry practice questions, including the OA and an OE...
- by Mike@Magoosh
Wed Nov 26, 2014 10:50 am- Forum: Problem Solving
- Topic: The center of circle Q is on the y-axis, and the circle pass
- Replies: 7
- Views: 5123
Cars P & Q are approaching each other on the same highwa
Cars P & Q are approaching each other on the same highway. Car P is moving at 49 mph northbound and Car P is moving at 61 mph southbound. At 2:00 pm, they are approaching each other and 120 mi apart. Eventually they pass each other. At what clock time are they moving away from each other and 45...
- by Mike@Magoosh
Fri Nov 21, 2014 4:15 pm- Forum: Problem Solving
- Topic: Cars P & Q are approaching each other on the same highwa
- Replies: 4
- Views: 1886
If 6^A = 2, 6^B = 5, and 6^Q = 15, then express Q in terms o
If 6^A = 2, 6^B = 5, and 6^Q = 15, then express Q in terms of A and/or B. (A) 3B (B) B + 3 (C) 5A + B (D) B^2 - 2B (E) B - A + 1 For the OA & OE of this particular problem, as well as a full set of challenging problems on exponents, see: https://magoosh.com/gmat/2014/challenging-gmat-problems-w...
- by Mike@Magoosh
Wed Nov 05, 2014 10:21 am- Forum: Problem Solving
- Topic: If 6^A = 2, 6^B = 5, and 6^Q = 15, then express Q in terms o
- Replies: 5
- Views: 3779
Frank and Georgia started traveling from A to B at the same
Frank and Georgia started traveling from A to B at the same time. Georgia’s constant speed was 1.5 times Frank’s constant speed. When Georgia arrived at B, she turned right around and returned by the same route. She cross paths with Frank, who still was coming toward B, when they were 60 miles ...
- by Mike@Magoosh
Tue Oct 28, 2014 9:42 am- Forum: Problem Solving
- Topic: Frank and Georgia started traveling from A to B at the same
- Replies: 0
- Views: 1228
Let S be the set of all positive integers that, when divided
Let S be the set of all positive integers that, when divided by 8, have a remainder of 5. What is the 76th number in this set? (A) 605 (B) 608 (C) 613 (D) 616 (E) 621 For a set of practice problems on sequences, as well as the OA & OE of this particular problem, see: https://magoosh.com/gmat/20...
- by Mike@Magoosh
Mon Oct 27, 2014 9:23 am- Forum: Problem Solving
- Topic: Let S be the set of all positive integers that, when divided
- Replies: 4
- Views: 2444
There are a total of 400 students at a school, which offers
There are a total of 400 students at a school, which offers a chorus, baseball, and Italian. This year, 120 students are in the chorus, 40 students in both chorus & Italian, 45 students in both chorus & baseball, and 15 students do all three activities. If 220 students are in either Italian...
- by Mike@Magoosh
Mon Oct 20, 2014 10:45 am- Forum: Problem Solving
- Topic: There are a total of 400 students at a school, which offers
- Replies: 3
- Views: 2245
1. For what value(s) of k is the following equation satisfied? 2k-9-k = 4k+6-3k" a. -5 b. 0 only c. 5/2 only d. No value e. Any value 2. What is the largest possible value of the following expression (x+2)(3-x)(2+x)^2(x-3)(2x+4) a. -576 b. -24 c. 0 d. 8 e. can’t be determined Dear Md Raihan ...
- by Mike@Magoosh
Wed Oct 15, 2014 12:21 pm- Forum: Problem Solving
- Topic: Math
- Replies: 3
- Views: 1650
Hi, Mike Why aren't we doing no 2 in the following way? t^2-1 = 2t-2 or t^2 -1 -2t +2 = 0 So, (t-1)^2=0 Now in this case t=1 is the answer. Why are we putting back the value of t in original question? So far I know, we have to check back equation only in case of Mod. So, why are we doing the same h...
- by Mike@Magoosh
Wed Oct 15, 2014 12:13 pm- Forum: Problem Solving
- Topic: Finding value from an equation
- Replies: 9
- Views: 2606
A vendor sells only Product A, for $6, and Product B, for $2
A vendor sells only Product A, for $6, and Product B, for $21. If Q% of the products sold are Product B, and if T% of the total revenue comes from sales of Product B, find Q in terms of T. http://s9.postimg.org/pb3krzbyz/vendor_answer_choices.jpg For the OA & OE, as well as more practice Word P...
- by Mike@Magoosh
Wed Oct 01, 2014 9:49 am- Forum: Problem Solving
- Topic: A vendor sells only Product A, for $6, and Product B, for $2
- Replies: 2
- Views: 3059
While the marketing department projected robust sales throug
While the marketing department projected robust sales throughout the summer, typically Allport Corporation’s biggest season, the drought in Midwestern states limited total revenue to only $300 million in the third quarter. (A) typically Allport Corporation’s biggest season, the drought in Midwe...
- by Mike@Magoosh
Tue Sep 02, 2014 8:32 pm- Forum: Sentence Correction
- Topic: While the marketing department projected robust sales throug
- Replies: 0
- Views: 1126
An importer wants to purchase N high quality cameras from
An importer wants to purchase N high quality cameras from Germany and sell them in Japan. The cost in Germany of each camera is E euros. He will sell them in Japan at Y yen, which will bring in a profit, given that the exchange rate is C yen per euro. Given the exchange rate of D US dollars per eur...
- by Mike@Magoosh
Mon Aug 11, 2014 10:34 am- Forum: Problem Solving
- Topic: An importer wants to purchase N high quality cameras from
- Replies: 3
- Views: 1620