1. Pardon?
(if you didn't hear or understand what the person said)
2. Would you mind repeating that?
3. What do you mean?
(asking for more information)
4. I'm not sure I follow you.
(= I don't understand)
5. Could you explain... ?

Fact
If you toss a penny 10,000 times, it will come up heads approximately 4950 times because the heads picture weighs more than the tails side, so it ends up on the bottom more often.      .. More >>