For The Mathematically Inclined

For The Mathematically Inclined

Anil Saigal
04/27/2017

Problem 1:

If a tire rotates at 400 revolutions per minute when the car is traveling 60 miles/h, what is the circumference of the tire?

Problem 2:

It takes a boat 3 hours to travel down a river from point Waltham to point Boston, and 5 hours to travel up the river from Boston to Waltham. How long would it take the same boat to go from Waltham to Boston in still water?

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Problems from 04/13/17

Problem 1:

What is the angle between the long (minutes) and short (hours) hands when the time is 10:10?

Problem 2:

How many times during a day is the angle between the long (minutes) and short (hours) hands equal to ninety degrees?

(Ignore the order of the hands)

Congratulations to Kishore Balsara, who was the winner of the last set of puzzles.

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