My son's elementary school math problem: A bear fell into a pit 5 meters deep and it took 1 second to fall to the bottom of the pit. Excuse me, what color is this bear? The brain hole is so big
....................., are you sure this is a math problem in primary school? The last question is actually what color the bear is, and there is no teasing in front of it. What's the answer? As we all know, besides the polar bear is white, the brown bear is brown and the black bear is black, what else?