MathDB

1

Part of 2003 AMC 10

Problems(2)

Even + Odd Counting Numbers

Source:

2/16/2008
What is the difference between the sum of the first 2003 2003 even counting numbers and the sum of the first 2003 2003 odd counting numbers? <spanclass=′latex−bold′>(A)</span> 0<spanclass=′latex−bold′>(B)</span> 1<spanclass=′latex−bold′>(C)</span> 2<spanclass=′latex−bold′>(D)</span> 2003<spanclass=′latex−bold′>(E)</span> 4006 <span class='latex-bold'>(A)</span>\ 0 \qquad <span class='latex-bold'>(B)</span>\ 1 \qquad <span class='latex-bold'>(C)</span>\ 2 \qquad <span class='latex-bold'>(D)</span>\ 2003 \qquad <span class='latex-bold'>(E)</span>\ 4006
arithmetic sequenceAMC 10
Fractions?

Source:

1/4/2009
Which of the following is the same as \frac{2\minus{}4\plus{}6\minus{}8\plus{}10\minus{}12\plus{}14}{3\minus{}6\plus{}9\minus{}12\plus{}15\minus{}18\plus{}21}? (A)\ \minus{}1 \qquad (B)\ \minus{}\frac23 \qquad (C)\ \frac23 \qquad (D)\ 1 \qquad (E)\ \frac{14}{3}
AMCAMC 12