A large fan is mounted to the ceiling of a factory. It’s turned off and perfectly still. An engineer climbs up and places a ping pong ball on top of one of the blades. Then she turns on the fan remotely. The ball does not fall. Why not?

Escape the summer heat and challenge your engineering mind. Take the quiz and prove you're hotter than the summer sun.

A cylindrical tank with a hole at the bottom drains in exactly 60 minutes when full. How long will it take to drain if it's initially only half full?

Celebrate American ingenuity and your engineering skills. Take this month's quiz and declare your independence from ignorance.

A 1-ton truck must cross a bridge that can hold no more than 1 ton. The truck is empty but barely weighs 1 ton. As it’s halfway across the bridge, a bird weighing 20 grams lands on it. Will the bridge collapse?

A Father's Day Tribute, Engineered! Show Dad you're the future of engineering by acing this month's quiz. Take the challenge and make him proud.

Five construction workers—Alex, Ben, Clara, Dan, and Eva—are tasked with working in five different zones, numbered 1 to 5, at a site. Each worker is assigned to one unique zone, and their assignments follow these rules:

Make Mom proud! Ace this month's quiz and give your mother the best gift: your success. Take the challenge and show her what you're made of.

You have been tasked with discovering the hidden password to a computer. The password is a single word. Luckily, the owner of the computer had just eaten chocolate before using it, so marks have been left on the keys. The password is 7 letters long and can also work backwards. What is the password?

Don't be fooled by the challenge! Prove your engineering prowess and avoid the April Fool's prank. Take the quiz and show them who the real deal is.