4 ms·
no, I thought about it. It's not a conclusion, its a supporting comment. Think what gives your brain the most exercise, remembering the 15th decimal place of PI
by sfphotoarts 17y ago
no, I thought about it. It's not a conclusion, its a supporting comment. Think what gives your brain the most exercise, remembering the 15th decimal place of PI or working out in your head how much extra light enters an aperture when you increase the radius by 20%.