Online registration is closed for this event. If available, tickets on the day of the event may incur an additional charge.

Hats and Liars, a two-part series with Peter Winkler

Tuesdays, July 28 and August 4 at 6:30 pm EDT (New York)

In this two-part series, Peter Winkler will explore hat puzzles and logic puzzles.  Each of these categories has spawned dozens of great conundrums.  Be prepared the next time someone hits you with one of these!  To register for both events at a discounted price of $27, complete the registration on this page.

Part One: "Hat Puzzles"
Tuesday, July 28 at 6:30 pm EDT (New York)

Imagine you are wearing a hat of unknown color.  Given a specific set of rules, can you deduce the color of your own hat based on the hat colors you see on other people's heads? 

To register for this individual event for $15, click here

Part Two: "Logic Puzzles"
Tuesday, August 4 at 6:30 pm EDT (New York)

To solve these riddles, you must make a series of deductions — sometimes even deductions about other people's deductions!  Some of those other people may be truth-tellers, others liars, or even random answerers — or they may even be friends wearing colored hats!

To register for this individual event for $15, click here

These are live-streamed events.  Occasional video recordings are made available for a fee at

July 28, 2020 6:30 pm to August 4, 2020 7:45 pm
MoMath Online
United States
Event Fee(s)
Event fee for two sessions $27.00
Event fee for two sessions plus $27 donation to support families in need $54.00