DAY 160
From Ask Marilyn by Marilyn Vos Savant:

A nanny with four small children passes a bubble-gum machine, and all four children beg for a gumball. However, the nanny knows they will cry unless they all receive the same color. The machine is almost empty, and she can count eight pink gumballs, six blue ones, and one green one. At a penny apiece, how much money is the most she might have to spend to get four matching gumballs?

Answer:

eight cents..........With the worst possible luck, the nanny could spend seven cents and end up with three pink gumballs, three blue ones, and the one green one. With a penny more, the next gumball would be pink or blue, making the fourth match.

DAY 161
A freight train one mile long is about to enter a tunnel that is one mile long. If the train is traveling at a speed of 15 miles per hour, how long does it take for the train to pass completely through the mile-long tunnel?

Answer:

8 minutes............15 mph equals 1 mile every 4 minutes. After 4 minutes, the train will be completely inside the tunnel. It will take another 4 minutes for the train to completely exit the tunnel.