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

Mysterious Subtraction

with Joshua Zucker

Tuesday, May 4 at 6:00 pm ET (New York)

Can we always get to zero by subtracting again and again?  How does the resulting pattern depend on our starting numbers?  Join Joshua Zucker, one of MoMath's most popular math presenters, as we try some common problem-solving strategies like working backwards — and then find ways to work around situations that aren't "workbackwardable."

This is a live-streamed event.  Occasional video recordings are made available for a fee at

May 4, 2021 6:00 pm   through   7:30 pm
MoMath Online
United States
Phone: 212-542-0566
Event Fee(s)
Free registration (while supplies last) $ 0.00
$15 donation to support families in need $ 15.00

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