Translate to multiple languages

If you enjoyed these post, make sure you subscribe to my Email Updates

Saturday, May 05, 2018

12 tricky math riddles only the smartest people can figure out | Culture - Reader's Digest

Check out these tricky math riddles.

"You might want to break out a calculator because it takes a genius to solve these tricky math riddles" according to Morgan Cutolo, Author at Reader's Digest.

Knight moves

 Photo: Min C. Chiu/Shutterstock

I have a calculator that can display ten digits. How many different ten-digit numbers can I type using just the 0-9 keys once each, and moving from one keypress to the next using the knight's move in chess? (In chess, the knight move in an L-shape — one square up and two across, two squares down and one across, two squares up and one across, and other like combinations)

Answer: You can form the numbers 5034927618 and 5038167294. You can also form their reverses: 8167294305 and 4927618305. Hence four different numbers can be made. The key point is to realize that the number must start or end on the '5' key, followed/preceded by the '0' key, otherwise, there is no way of using all ten keys during the route. Only 2 percent of people can solve Einstein's Riddle. Can you?