Dealing with a problem here that probably has a clever solution which is not coming to me: I have an m x n grid. This grid contains some circles. I would like to find a set of squares that covers the ...

A buddy of mine had an interview and was asked some horrible interview question. He asked me about it afterward, but I wasn't any help. This has been bugging me all ...

A Venn diagram shows the relationship between a group of different things. It allows us to sort data into two circles which overlap in the middle. Venn diagrams are great for helping us organise two ...

Mastercard’s logo has changed little since 1968. The brand’s name was changed from Master Charge to MasterCard in 1979, and its upright font was replaced with italics in 1990, but the core elements – ...

Update 8 January 2019: Two-and-a-half years on from Mastercard’s rebrand, the company has decided to drop its name from its logo, leaving only its two, overlapping circle symbols as its main identity.

In his book The Mathematical Universe, mathematician William Dunham wrote of John Venn’s namesake legacy, the Venn diagram, “No one in the long history of mathematics ever became better known for less ...