Answers to Last Fridays Brain-O Quiz:
1. Fifty-first …
2. … letter in this sentence.
3. 10^6 = 2^6 x 5^6 = 64 x 15,625.
4. Swap the eight and the nine, but when you move the nine turn it upside down so that it is a six.
5. None. If ten players have the right helmet, then the only helmet left must belong to the only player that is left.