| Column A | Column B |
The units digit of 1414 | The units digit of 1616 |
Solution for GRE Math Problem 21:
The area of the circle with the radius of R is
Answer:C
Sunday, January 31, 2010
GRE Math Problem 22
Compare two values:
Solution for GRE Math Problem 21:
The area of the circle with the radius of R is
R2. To cet the are of the ring, we should substract the area of the inner circle from the area of the outer circle. So, the are of the smallest circle is .
The area of the whole figure is x42=16. The area aof the yellow resion is x32-x12=8. It is exactly the half of the whole figure's area. It means, that the area of the shaded resion equals the area of the yellow region.
Answer:C
Solution for GRE Math Problem 21:
The area of the circle with the radius of R is
Answer:C
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