Puzzle: Is 36 the only triangle-square number?

2016-07-13

[public] 127K views, 2.45K likes, 29.0 dislikes audio only

If you do find other triangle-square numbers, and/or a pattern behind them, do label any spoilers in the comments carefully.

And don't just look them up!

Sorry this is such a quick video. True story: I've been waiting for government paperwork so I can put a different video up, but the wait has gone on too long. This should tide us all over for a bit. Other mysterious video along soon!

I'll do a solution video to this one sooner or later.

Music by Howard Carter

Design by Simon Wright

MATT PARKER: Stand-up Mathematician

Website: http://standupmaths.com/

Maths book: http://makeanddo4D.com/

Nerdy maths toys: http://mathsgear.co.uk/