Brain Teasers
Prison Break
Joe is trying to run away from the police. He runs at an average of 5 miles per hour. But, sadly, the police cars go at 15 miles an hour. The sewer, which will lead him to freedom, is 20 miles away.
How far is Joe from the police, assuming that when he reaches the sewer, they will have just caught up with him?
How far is Joe from the police, assuming that when he reaches the sewer, they will have just caught up with him?
Hint
Think of the sewer as point 0 on a number line.Answer
He is 40 miles away. Assuming that the sewer is 0, when he is 5 miles away, the police are 15 miles, keep doing this until he gets to the distance he is from the sewer now, which is 20 miles away. You should see that the police are 60 miles away from the sewer.Hide Hint Show Hint Hide Answer Show Answer
What Next?
View a Similar Brain Teaser...
If you become a registered user you can vote on this brain teaser, keep track of which ones you have seen, and even make your own.
Solve a Puzzle
Comments
I hate mathematics!
Its a good thing you keep on reading these math teasers. You just need a little practice.
there are infinite possible answers... instead of 40 miles away, he could be 10 miles away from the police, 5 miles away from the sewer and the police could be 15 miles away from the sewer... the distance between joe and the sewer has to be half of the distance between joe and the police...
sorry I didn't read that line which said the sewer is 20 miles away.. forget what I said in my earlier comment
Is this even a brain teaser?
Well, I liked it! It was fun and really easy. But that doesnt make it less fun because its easy, it makes it more fun! most of these i cant get right.
It has that nasty textbook smell.
To post a comment, please create an account and sign in.
Follow Braingle!