Sonya’s new puzzle

Did you know that Sonya is a fan of street art? She has also decorated her home with mathematical graffiti, and of course it includes a small enigma.

Try to solve it by replacing the question mark with the correct number.

We will give you the solution at the end of the month. Meanwhile, plenty of Sonya’s other challenges can be found here.

You would like some more? Visit Buzzmath to solve other puzzles.