Summer math news
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- July
- 7
Mathcounts.org has updated its Web site for the summer to give kids a chance to exercise their minds and play with numbers for fun.
The site, which is designed for middle school kids, includes a problem of the week, allows kids to compete against math-expert kids on the Mathcounts challenge in May, a new blog on the world of math and middle school kids and jokes and stuff, according to Barbara Pflughaupt, the Mathcounts spokeswoman .
The site is mathcounts.org.
Here is a sample problem:
“With the primaries over, we are left with two presumptive candidates for president: Barack Obama and John McCain. Let’s take a look at the candidates. Durinng the primaries, Barrack Obama needed 2,118 delegates to earn the democratic nomminatoin. He earned a total of 2,180 delegates.
John McCain needed 1,091 delegates to clinch the Republican nomination. He earned a total of 1,504 delegates.
By how many percentage points more than Obama did McCain exceed his reuired number of delegates? Express your answer to the nearest 10th.
Solution:
Barrack Obama (2,180 – 2,118)/2,118×100 = 2.927 percent.
John McCain (1,504 – 1091)/1091×100 = 37.855 percent
37.855 – 2.927 = 34.9 percentage points.
This entry was posted
on Monday, July 7th, 2008 at 2:34 pm by Randi Weiner.
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