I'm going to give you a practice one before you try it out on your friends. I chose 4 numbers. My sum is 72. Tell me what my 4 numbers are.

Some Month Some YearS M T W TH F S 1 2 3456789101112131415161718192021222324252627282930## Next: Check your answer.

URL http://math.rice.edu/~lanius/Lessons/calentry.html