All Questions
32
questions
4
votes
6
answers
5k
views
Finding the Heavy Coin by weighing twice
Suppose you have $100$ coins. $96$ of them are heavy and $4$ of them are light. Nothing is known regarding the proportion of their weights. You want to find at least one genuine (heavy) coin. You are ...
anonymous
6
votes
5
answers
2k
views
Least wasteful use of stamps to achieve a given postage
You have sheets of $42$-cent stamps and
$29$-cent stamps, but you need at least
$\$3.20$ to mail a package. What is the
least amount you can make with the $42$-
and $29$-cent stamps that is ...
- 36.6k