The idea of taking 2/3 cups, spreading it out, and removing 1/4 to get 2/33/4 cups is pretty damn clever and totally street-smart about dividing a hard problem into smaller, more easily manageable problems on the fly.

I'm not sure I could've come up with that method just like that. I would've been conditioned to look out if the fractions reveal an easy answer that I can deduce immediately without calculating anything, and then probably just ended up doing 23 and 3*4, revealing the answer. If it had been something more complex -- such that couldn't have been able to intuit abstractly about it I think I might have eventually come up with some variant of a more visual, hand-measurable method.