Two friends are traveling on a train from NY to Boston. One of the friends says "It seems that the Boston-NY trains pass us every 30 mins. How many Boston trains do you think arrive in NY every hour?"
8 comments:
Kalonni
said...
2? Since they pass them every 30 minutes and there are 60 minutes in an hour...
This is so cool that your whole family is participating. Try simulating the trains if you have enough people. The answer is still hiding. One of the previous puzzles - Atlantic Journey - may give a hint.
Ok, the new consensus is 1. This is because if they are passing them every 30 minutes, it would take at least another 30 minutes to reach the destination.
Hi Math Mom, I would also say 1. If the two friends' train weren't moving, then the answer would be 2, but since their train is moving away from NY, then the trains they pass are spaced apart by more than 1/2 hour.
You are both right - one train is arriving to NY from Boston every hour. Kalonni was first to come up with the correct answer, and Barry provided the correct explanation. I think you both deserve a point. Kalonni - please email me your snail mail address to maria at marialando dot com and I will send you a prize. Barry - welcome to the Marathon. 2 more miles (ooops, puzzles) to a prize.
My name is Maria Lando. I am a parent, a wife, a friend, an occasional cook, a shopper, a gym member, a world traveler, a regular working mom who is trying to balance everything and enjoy life with the help of humor and mathematics. Read more ...
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8 comments:
2? Since they pass them every 30 minutes and there are 60 minutes in an hour...
Nope. There is a trick...
No Boston trains will arrive in New York. All Boston trains will arrive in Boston.
I take back my last answer...
My family has determined that it should be 3.
ie: 9:00, 9:30, 10:00...
This is so cool that your whole family is participating. Try simulating the trains if you have enough people. The answer is still hiding. One of the previous puzzles - Atlantic Journey - may give a hint.
Ok, the new consensus is 1. This is because if they are passing them every 30 minutes, it would take at least another 30 minutes to reach the destination.
Hi Math Mom, I would also say 1. If the two friends' train weren't moving, then the answer would be 2, but since their train is moving away from NY, then the trains they pass are spaced apart by more than 1/2 hour.
You are both right - one train is arriving to NY from Boston every hour. Kalonni was first to come up with the correct answer, and Barry provided the correct explanation. I think you both deserve a point.
Kalonni - please email me your snail mail address to maria at marialando dot com and I will send you a prize.
Barry - welcome to the Marathon. 2 more miles (ooops, puzzles) to a prize.
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