That's what I was missing - I'm used to having to face the wall when standing in the corner!Stand in a corner of any square room, Facing the opposite Corner. look straight ahead
Well, taking the question at face value, I think 9 coins: 4 pennies, 1 nickel, 2 dimes, 1 quarter, 1 half dollar.
Am I missing something more subtle?
EDIT - I make it only 8 coins with British currency, so we're clearly much more efficient
That is techincally correct. But I didn't include that the total value of all coins cannot exceed 99 Cents.
It's about convenience. Most people would rather have 2 quarters than a half dollar. Because the half dollar is quite large and can't be used in vending machines.Why don't you have many half dollars in circulation?
Because it is impossible for the circular manhole cover to fall through the hole. A sqare cover (or any other shape) could fall through the hole.What about the one about why all man hole covers a circular?