MathDB

5

Part of 2010 AMC 10

Problems(2)

Fixed Circumference Circle

Source: AMC 10 2010A Problem 5

2/10/2010
The area of a circle whose circumference is 24π 24\pi is kπ k\pi. What is the value of k k? <spanclass=′latex−bold′>(A)</span> 6<spanclass=′latex−bold′>(B)</span> 12<spanclass=′latex−bold′>(C)</span> 24<spanclass=′latex−bold′>(D)</span> 36<spanclass=′latex−bold′>(E)</span> 144 <span class='latex-bold'>(A)</span>\ 6 \qquad <span class='latex-bold'>(B)</span>\ 12 \qquad <span class='latex-bold'>(C)</span>\ 24 \qquad <span class='latex-bold'>(D)</span>\ 36 \qquad <span class='latex-bold'>(E)</span>\ 144
geometryAMC
Mondays and Wednesdays

Source: 2010 AMC 10B Problem 5

2/25/2010
A month with 31 days has the same number of Mondays and Wednesdays. How many of the seven days of the week could be the first day of this month? <spanclass=′latex−bold′>(A)</span> 2<spanclass=′latex−bold′>(B)</span> 3<spanclass=′latex−bold′>(C)</span> 4<spanclass=′latex−bold′>(D)</span> 5<spanclass=′latex−bold′>(E)</span> 6 <span class='latex-bold'>(A)</span>\ 2\qquad<span class='latex-bold'>(B)</span>\ 3\qquad<span class='latex-bold'>(C)</span>\ 4\qquad<span class='latex-bold'>(D)</span>\ 5\qquad<span class='latex-bold'>(E)</span>\ 6
AMC