MATHCOUNTS Mini: February 2011
Loading...
Loading...
1,824
Loading...
Uploaded by mathcountsfdn on Jan 28, 2011
MATHCOUNTS Mini: February 2011; see a better version at www.mathcounts.org!
- 11 likes, 0 dislikes
-
- 9:36
MATHCOUNTS Mini: February 2010by mathcountsfdn1,768 views
- 9:38
MATHCOUNTS Mini: January 2011by mathcountsfdn1,839 views
- 8:50
MATHCOUNTS Mini: December 2010by mathcountsfdn2,056 views
- 8:48
MATHCOUNTS Mini: October 2010by mathcountsfdn1,831 views
- 12:58
MATHCOUNTS Mini May 2011by mathcountsfdn1,177 views
- 9:20
MATHCOUNTS Mini - September 2011by mathcountsfdn2,115 views
- 10:00
Raytheon MATHCOUNTS National Competitionby fffffdsa8,544 views
- 8:41
MATHCOUNTS Mini: November 2010by mathcountsfdn1,162 views
- 12:07
MATHCOUNTS Mini - January 2012by mathcountsfdn2,049 views
- 6:39
MATHCOUNTS Mini - October 2009by mathcountsfdn1,379 views
- 10:13
MATHCOUNTS Mini October 2011by mathcountsfdn1,736 views
- 8:10
MATHCOUNTS Mini: April 2010by mathcountsfdn1,201 views
- 6:56
2009 Raytheon MATHCOUNTS National Competition PART 1 - 10 minute versionby mathcountsfdn5,958 views
- 6:04
MATHCOUNTS Mini September 2009 Part 1by mathcountsfdn2,588 views
- 9:07
MATHCOUNTS Mini - December 2011by mathcountsfdn2,429 views
- 10:00
MATHCOUNTS Mini: January 2010, Part 2by mathcountsfdn1,085 views
- 9:08
2001 MATHCOUNTS National Competition Highlights Videoby mathcountsfdn496 views
- 5:09
CDR Match 3 - 2010 Raytheon MATHCOUNTS National Competitionby mathcountsfdn1,158 views
- 7:53
MATHCOUNTS Mini - February 2012by mathcountsfdn846 views
- 4:26
2009 Raytheon MATHCOUNTS National Competition PART 2 - 10 minute versionby mathcountsfdn5,527 views
...ah...a classic "simple-sounding" math problem that is still unsolved is a proof of Goldbach's Conjecture (every even whole number > 2 = sum of 2 primes)
jwm239 1 month ago
I did this a different way...
The probability that the first number would be greater than 3/4 (guaranteed fail) is 1/4, so there is a 3/4 chance the second number CAN be 1/4 higher than the first.
Similarly, the probability that the second number is at least 1/4 is 3/4.
Then, the probability that both work is 9/16.
After that, the first number will be, on average, 1/4 lower than the second, so there is a 1/2 chance of it being 1/4 lower or more. (1/2)*(9/16)=9/32.
HulloZeebaNeighba 10 months ago
i got this right on the test but i forgot what i did
MAGNUMandBARRETTA 11 months ago
Thank you for making these videos! They are vvery helpful!
snakefan8 1 year ago