Author |
Topic: Autistic chap (Read 512 times) |
|
alien
Guest
|
You are autistic, and there are 90 stairs you have to climb. When will you reach the last, 90th stair, if you need just one second to step on the first stair, then for each next stair it takes a second more (2 secs for the second stair, three for the third, and so on)?
|
|
 IP Logged |
|
|
|
Three Hands
Uberpuzzler
Gender: 
Posts: 715
|
 |
Re: Autistic chap
« Reply #1 on: Mar 7th, 2005, 10:02am » |
 Quote  Modify
|
4095s, or 1 hour, 8 minutes and 15 seconds
|
|
IP Logged |
|
|
|
alien
Guest
|
Yes. 
|
|
IP Logged |
|
|
|
Grimbal
wu::riddles Moderator
Uberpuzzler
Gender:
Posts: 7527
|
|
Re: Autistic chap
« Reply #3 on: Mar 7th, 2005, 3:24pm » |
Quote Modify
|
Glad to see you solved that one in less than 1 hour and 8 minutes 
|
|
IP Logged |
|
|
|
Lalamel
Newbie
Whatever you do, don't do whatever...
Gender: 
Posts: 24
|
|
Re: Autistic chap
« Reply #4 on: Mar 9th, 2005, 6:02am » |
Quote Modify
|
or, be practical and use the elevator... therefore, 1 sec to get into the elevator + time to get up there (depending on the elevator) + 1 sec to get out of the elevator (not 2 secs because you had some rest while in elevator)... so, it could be 2s + t, and the t can be determined emphirically, or contact the elevator manufacturer for further detail.
and - forgot to give the time it takes you to get from the stairway to the location of the elevator... my buiding - 1 sec x 2, so we get:
4s + t
as the final formula.
|
|
IP Logged |
|
|
|
|
RIDDLES SITE
WRITE MATH!
Home 
Help 
Search 
Members 
Login 
Register
Reply
Notify of replies
Send Topic
Print
Remove