The Wheeler



An 18-wheeler is crossing a 4 kilometer bridge that can only support 10,000 kilograms and that’s exactly how much the rig weighs. Halfway across the bridge a 30 gram sparrow lands on the cab, but the bridge doesn’t collapse. Why not?

Ah! Click here to read the solution.



The Egg on the Roof



A rooster lays an egg at the very top of a slanted roof. Which side is the egg going to roll off on?

Ah! Click here to read the solution.