Subscribe now

Puzzle #249: Can you calculate exactly how much more paint is needed?

Can you solve this week’s arithmetical puzzle, Espresso geometry? Plus the answer to puzzle #248

22 November 2023

New Scientist Default Image

#249 Espresso geometry

Set by Katie Steckles

The Circle Coffee Shop was getting a rebrand and its big, circular logo on the shop wall was getting repainted to match its new identity, The Equilateral Triangle Coffee Shop. The painter was just packing up their brushes when the coffee shop boss came stomping over.

New Scientist Default Image

“This isn’t right! You’ve painted an equilateral triangle that fits exactly inside the old circle logo! We wanted the new triangle logo to just cover the whole of the old one!” The painter looked doubtful. “I’ve just used a whole tin of paint doing this. If you want more paint on the wall, you’ll have to pay for any extra!”…

Sign up to our weekly newsletter

Receive a weekly dose of discovery in your inbox! We'll also keep you up to date with New Scientist events and special offers.

Sign up

To continue reading, subscribe today with our introductory offers

View introductory offers

No commitment, cancel anytime*

Offer ends 2nd of July 2024.

*Cancel anytime within 14 days of payment to receive a refund on unserved issues.

Inclusive of applicable taxes (VAT)

or

Existing subscribers

Sign in to your account