Off Topic > Off Topic
I'm a highly qualified mathematician, AMA
Maxwell.:
--- Quote from: Electrk. on August 15, 2017, 01:33:07 PM ---https://forum.blockland.us/index.php?topic=294722.0
--- End quote ---
i solved it eventually however
gr8dayseth:
--- Quote from: Maxwell. on August 15, 2017, 01:35:23 PM ---i solved it eventually however
--- End quote ---
wow inspiring this is how i like my calculators to be
Shift Kitty:
--- Quote from: phflack on August 08, 2017, 11:25:17 AM ---saw an interesting problem last night
if there are 25 ducks, and you can only race 5 ducks at a time, how many races do you need to see which 3 ducks are the fastest?
each race will only tell you their relative speeds (ie ducky 3 was the slowest, but ducky 4 was the second fastest)
--- End quote ---
25 ducks.
Race 5 times, eliminate the 2 slowest from each race. As there's no possibility that they will be in the top three overall if they couldn't be the top three of their own race.
15 ducks.
Race 3 times, again, eliminating the 2 slowest.
9 ducks.
race 2 times, eliminating 2 from the first race, and then including the 3rd place of the first race into the second race, then eliminating the two slowest from that.
5 ducks.
Race them.
11 races
Electrk.:
--- Quote from: Shift Kitty on August 15, 2017, 02:46:38 PM ---25 ducks.
Race 5 times, eliminate the 2 slowest from each race. As there's no possibility that they will be in the top three overall if they couldn't be the top three of their own race.
15 ducks.
Race 3 times, again, eliminating the 2 slowest.
9 ducks.
race 2 times, eliminating 2 from the first race, and then including the 3rd place of the first race into the second race, then eliminating the two slowest from that.
5 ducks.
Race them.
11 races
--- End quote ---
no he already solved it 1 race
Shift Kitty:
--- Quote from: Electrk. on August 15, 2017, 03:29:02 PM ---no he already solved it 1 race
--- End quote ---
its literally the same answer but with only half the 1s