Yes, when I first encountered this one, I spent over 3 minutes trying for a formal solution before seeing that it needs to be greater than 35 ðŸ˜¦ And the other method I noticed only on revisiting the problem later – at the second try it struck me quite quickly ðŸ˜› Very tricky one to visualise.

That was a deadly problem… one of the best u have posted…

Yes, when I first encountered this one, I spent over 3 minutes trying for a formal solution before seeing that it needs to be greater than 35 ðŸ˜¦ And the other method I noticed only on revisiting the problem later – at the second try it struck me quite quickly ðŸ˜› Very tricky one to visualise.

regards

J

Seriously awesome!

(Y)