Uploaded March 2016 | Updated September 2026, 51 minutes ago

---

This is the easiest brain teaser that will rack your brain. 5 people can build 5 houses in 5 days. How long will it take 100 people to build 100 houses?

My name is Chris and my passion is to teach math. Learning should never be a struggle which is why I make all my videos as simple and fun as possible. I cover all subjects from basic level math through upper level calculus and statistics. I also make brain teaser and Rubik's cube videos for fun.

Check out all of my other brain teasers.

The Easiest brain teaser driving the internet insane (Fruit problem)
youtube.com/watch?v=yuseE8o_UK8

Heaven and hell - Brain Teaser
youtube.com/watch?v=YOgKI0HWCnA

Two Burning Ropes - Brain Teaser
youtube.com/watch?v=IyGV5Ry9pQw

Cross the river - Brain Teaser
youtube.com/watch?v=vTWfsUZSCXo

Game show - Brain Teaser
youtube.com/watch?v=ruX49qla1Ig

Don't checkmate - Brain Teaser
youtube.com/watch?v=fuEjP3XfaXA

Counterfeit coins - Brain Teaser
youtube.com/watch?v=d6eF98_4lHU


Channel Page - Youtube.com/MathMeeting
Facebook Page - facebook.com/MathMeeting
Patreon Page - patreon.com/MathMeeting