The Heavier One
If you had 1000 kilograms of feathers and 1000 kilograms of stones which would be heavier?
Ah! Click here to read the solution.
Neither. They both weigh 1000 kilograms.
The Owner with the Canaries
I am the owner of a pet store. If I put in one canary per cage, I have one bird too many. If I put in two canaries per cage, I have one cage too many.
How many cages and canaries do I have?
Ah! Click here to read the solution.
Four canaries and three cages.
If you put one canary in each cage, you have an extra bird without a cage. However, if you put two canaries in each cage then you have two canaries in the first cage, two canaries in the second cage and an extra cage.