DAY 268
If I put one canary in each cage, I have one canary too many. If I put two canaries in each cage, I have one cage too many. How many canaries and how many cages do I have?

Answer:

4 canaries and 3 cages...............Let X = canaries and Y = cages.
X - 1 = Y and X/2 + 1 = Y...............So X - 1 = X/2 + 1.