Saturday, August 20, 2011

Game Gems

Sunday, July 17, 2011

Smart Flash Games

The whole first half of 2011 I was involved in the creation of interesting flash games. So, I uploaded them to the web and created my portfolio blog, where you can play them and have fun. The games, besides being entertaining, hepl the players train their memory, attention and reaction, which is significant for successful GRE exams.

Welcome to Smart Flash Games!
Sky Control

5 Brain Teasers

I Wanna Win!

Saturday, July 10, 2010

GRE Math Problem 78


In the preceding figure, if l1||l2, what is the value of x?

(A) 36 (B)54 (C)90 (D)144 (E) 154

Solution for GRE Math Problem 77:
As the angle between the base of the triangle and the vertical line is not marked, the relation between x and y could be of any value. Answer:D

Wednesday, May 26, 2010

GRE Math Problem 77


Compare two values:
Column A Column B
x y

Solution for GRE Math Problem 76:

The value of this angle can be found as the sum of the angles a and b. As 20 minutes is 1 third of an hour, angle a is one third of 360 degrees, and equals to 120 degrees.
Then, angle b is two thirds of and angle between "11" and "12", then, it is two thirds of 30 degrees, which equals to 20 degrees.
Total 120+20=140 degrees
Answer: C

Thursday, May 13, 2010

GRE Math Problem 76

Compare two values:
Column A Column B
The measure, in degrees, of the smaller angle formed by the hour hand and the minute hand of a clock at 11:20 140

Solution for GRE Math Problem 75:

As he made a 25% profit on one painting, he sold it for 125% of the original price.
 $2000=125%
$1600=100% - its original price was $1600

As he had a 25% loss on the second painting, he sold it for 75% of the original price.

$2000=75%
$2666.(6)=100% - its original price was $2666.(6)

Last year Leo paid for both paintings $1600+$2666.(6)=$4266 and this year he got $4000 for selling them. So, he lost more than $100

  Answer:(C) He lost more than $100.

Thursday, May 6, 2010

GRE Math Problem 75

Last year Leo bought two paintings. This year he sold them for ">2000 each. On one, he made a 25% profit, and on the other he had a 25% loss. What was his net loss or profit?
(A) He broke even.
(B) He lost less than $100.
(C) He lost more than "$100.
(D) He earned less than $100.
(E) He earned more than $100.

Solution for GRE Math Problem 74:
By what fraction is formula greater than formula?
formula
So, formula of the number is 7. Therefore, the whole number is 12.

But we were asked about the formula of this number, so, the answer is 12*3/5=20. Thank you for pointing this in comment :)

Answer:(D)20

Tuesday, May 4, 2010

GRE Math Problem 74

If formula of a number is 7 more then formula of the number. What is formula of the number?
(A) 12
(B) 15
(C) 18
(D) 20
(E) 24

Solution for GRE Math Problem 73:
In order to determine the total number of players we have to multiply the number of players in one team by the number of teams in one division by the number of divisions. We’ll get dtp
Answer: (B) dtp