# logic

Last year

2023

conspiracies

Most fact-based counterarguments to conspiracy beliefs don't work, study finds

6 Apr 2023

11.8k

46

All time

Take a Break

Take a break and try to figure out this confusing puzzle

11 Sep 2015

30.3k

29

cheryl's birthday

The entire internet is struggling with this simple maths puzzle for teenagers

14 Apr 2015

7.9k

8

Voices

Opinion: Philosophy for kids? It's absolutely essential for the classroom

Peter Ferguson

11 Jun 2014

3.3k

66

Do The Math

How to guess any number under 1,000 in ten steps or less

24 Nov 2013

58.1k

28

brainteaser

A simple logic question that most Harvard students get wrong

16 Dec 2012

63.7k

128