Halfing 3D Shapes
Cutting 3D shapes parallel to the base such that the top and bottom resulting portions have the same volume.
Cutting 3D shapes parallel to the base such that the top and bottom resulting portions have the same volume.
Is this method of constructing a regular polygon an approximation? or theoretically accurate?
Separating egg-laying chickens from non-egg-laying chickens by keeping them in boxes.
Counting the number of ways to make an exact amount using Canadian coins and bills.
“等等,你怎么又写我死掉的故事?”灰灰生气地说。 “啊,真的!一不留神就又选了这样的故事。”小丹不好意思地挠了挠脸。“不过别急,这个王子还是这个故事的主角呢。”
Tiling a long and narrow gridded strip with square tiles.