A right triangle with a red and yellow square attached. Two circular arcs centered in the triangle vertices. What is the area of the orange rectangle in terms of red and yellow?
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Solution
Orange=red*yellow/(red+yellow).

Poem
House of orange
Huis van Oranje Nassau
Once the Netherlands became a monarchy
The name was for the family
For all this big dinasty
They had some relations with the french Burgundy
The dutch rebellion is part of the story
Yesterday and tomorrow are History
And makes good poetry

One reply on “House of Orange”
I am not sure why this puzzle is categorized Advanced. My criterion is that if I can do it in my head fairly quickly after waking up and checking Twitter for your new puzzle, it should be “Beginner”.