Ladder
Math brain teasers require computations to solve.
Assume the ladder is NOT an extension ladder.
A 25 ft ladder is placed with its foot 7 ft away from a building. If the top of the ladder slips down 4 ft, how many feet will the bottom slide out?
HintIt is not 4 ft. Try some Pythagorean theoreming.
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Answer
8 ft
First triangle: 7 squared + 24 squared = 25 squared, so the top of the ladder was 24 feet high.
24  4= 20. 25 squared  20 squared = 225. Take the square root of that and you get 15: the new base of the triangle. 15  7 (the old base) = 8ft
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Comments
Splatt
Mar 26, 2006
 Yeah craz! Grats on your first teaser. Good job! 
mitzimesser
Mar 26, 2006
 Much love to you on your first. 
paul726
Mar 26, 2006
 Way to go, CC! Congrats on your first teaser! 
nurpin
Mar 26, 2006
 The way you worded the question can give the suggestion that the ladder is an extention ladder. Therefore if the top slips down, as you say you're not saying the whole ladder slips down 4 ft., just the top  then the bottom, most likely, will not move at all! For as we all know, extension ladders can have the problem of the top slipping down when not properly hooked, thus making a loud clank, but leaving the bottom of the ladder where it originally was give or take a few millimeters or so. 
Crazycriely
Mar 26, 2006
 YEY!! lol it came from a problem i had for homework so sorry about the confusion 
mrfatbat
Mar 26, 2006
 It has been sooooooooooo long since I have used pythag theorem 
cms271828
Mar 26, 2006
 Well done, at least your teasers make it on here, mine are way to difficult for the editors to solve, they assume everyone else can't do it which isn't true.
I'm tired of thinking up puzzles and having em rejected. 
exterminator
Mar 27, 2006
 Chur teaser rocks.
It's very good. Congrats on getting it accpeted!
I got 6ft. does that count as the right answer? XD 
silverlady
Mar 27, 2006
 great job, crazy 
sgtammo
Mar 27, 2006
 Impressive first teaser! I hope to see more. 
(user deleted)
Mar 28, 2006
 Just for the sake of accuracy, you did mean to put in the solution that 25 squared  20 squared = 225 right? 
coltonr1
Mar 28, 2006
 inpressive 1st teaser like mine but wow urs it's off the hook! lol
but im not a math wiz but still good teaser 
Crazycriely
Mar 29, 2006
 lol ty everyone!! 
FantomXA
Mar 30, 2006
 CRAZY wrecks my head... yet again..LOL

warmonkey318
Mar 31, 2006
 Guess what? i just learned about that Pythagorean Theorem on thursday in math class!! (but i still got it wrong)lol 
zigthepig
Apr 03, 2006
 I also just learnt Pythagorus Therom so I got it after reading the hint. Nice job my fellow crazy one 
gunn56
Apr 12, 2006
 Hey CC, great first teaser (esp since I'm a Math teacher). I really do love ladder problems and this was a great one. (plus, I did it quick in my head and got it WRONG ...... don't tell my students) 
Crazycriely
Apr 12, 2006
 thank you!!! and ok i wont gunn lol 
Mellew
Apr 22, 2006
 w2g gurlie
P.S. i got it rong 
cb123
Jun 13, 2006
 cool teaser i liked it but i didnt get it right away but still cool teaser 
Psychic_Master
Jun 25, 2006
 Good job on your first teaser, CC! 
jlvsbeks
Jun 27, 2006
 Ha! I still remember how to do this
(well i only learned it last year, but i don't usually think during the summer) 
dopy13
Aug 09, 2006
 nerd
it's just dopy lol 
Crazycriely
Aug 10, 2006
 lol i find it ironic and comical that my first accepted teaser was about a ladder...and i just fell off one a week ago 
walston
Sep 14, 2006
 boring, but interesting ...just kidding...lol 
soccerfreak
Sep 27, 2006
 huh? 
appleandeve
Sep 28, 2006
 Yayy, I did it that was really easy, actually. 
babycee
Apr 12, 2007
 hey i thought this was a trick question. the bottom stay on the ground. this was hard. 
(user deleted)
Dec 27, 2007
 The question is worded poorly. The correct answer is that the ladder slips out 1 foot (being the sum of the original 7 plus an extra foot, giving an overall distance from the wall of 8 feet) 
kauphi1976
Dec 21, 2008
 :) nce one.. so u mean before by buddy pytho , one would have to use a actual ladder to find the answer ?
johnlr  pls read the answer again.. the ladder slips out 15 ft ... so 8 more than the previous 7ft 
Zarahemla05
Dec 21, 2008
 I got it, but if I had to show my work, I would have got an F!
Thanks, great teaser and now I have something to look up and learn! 
doehead
Dec 21, 2008
 Math was one of my strongest subjects,so this was easy. 
crazy10man
Dec 21, 2008
 Suddenly I'm back in high school again! Will there be a test on this? Great teaser. I'm ready for another!!! 
bradon182001
Dec 21, 2008
 Math is no my thing. So I didn't even try, but thanks for posting. 
westbrook
Dec 21, 2008
 Complicated answer. 
GebbieRose
Dec 21, 2008
 Nice teaser. 
auntiesis
Dec 21, 2008
 A squared + B squared = C squared, boy does that bring back memories of elementary school. Always loved math. Good one. 
here2
Dec 21, 2008
 very nice teaser. I enjoyed it. Thanks. 
Crazycriely
Dec 21, 2008
 WOO HOO! Second time this has been the Teaser of the Day...I think. =D 
dsjt
Dec 22, 2008
 I know that 8ft is the correct answer using geometry.
A lateralthinking (or would that be ladderal thinking) solution would be that both of the ladder's feet slid out. Therefore the ladder slid two feet out. 
avonma
Dec 24, 2008
 I gave up that kind of math when I graduated from college. I couldn't even understand the explanation! 
javaguru
Jan 02, 2009
 12 seconds in my head. I could even guess the answer before doing it since I was pretty sure you were using a 345 right triangle for the second part since 25 is a multiple of 5.
Still, nice teaser. 
opqpop
Sep 11, 2010
 Know your 72425 and 345's!!!! 
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