Puzzle - 42 Pièces - Horloge

The pieces are square with curved edges, making them different from each other even though they look the same. These pieces are called quiz pieces, as each piece only fits in the right place. On each coin is a clock, and the clocks show different times. 

On the frame below the coin, the time is indicated by both numbers and letters. The numbers indicate the time. The 42 hours are chosen to give a wide variation, and show the clock at full hours, half hours, 25 minutes, 20 minutes, 15 minutes, 10 minutes and 5 minutes. 

Those who want to learn to tell time can work at their own pace, try and fail. 

When the pieces fall into place, you know the answer is correct, so you learn quickly.