POW: 12-03-2018

POW: 11-26-2018

POW: 11-19-2018

POW: 11-12-2018

POW: 11-05-2018

POW: 10-29-2018

POW: 10-22-2018

POW: 10-15-2018

POW: 10-08-2018

Riddle:

Answer:

Turn over both hourglasses at once. When the four-minute hourglass runs out, turn it over. When the seven-minute hourglass runs out, turn it over. When the four-minute timer runs out this time (eight minutes have elapsed), the seven-minute hourglass has been running for one minute. Now turn over the seven minute timer back over. When the timer runs out, nine minutes have elapsed.

POW: 10-01-2018

To see more past Problem of the Week's refer to the Riddles Newsletter annals.