27+2 is meaningless.
2. It used to be 1 yuan, 1 kg, but now it is 7 Mao Cong and 3 Mao Cong, which is equal to 1 yuan. You can buy two kg! !
3. It is much easier to know whether it is heavy or light-divide the ball into three parts, not four parts, just weigh two groups to know which group the problem is, then divide the problem into two parts, weigh it again to know the problem group, and finally weigh two of them to know the problem ball.
4. Carry 1000 for the first time, walk 334 kilometers and leave 666, put it down and turn around.
The second time I carried 1000, I walked 334 kilometers and walked 666. I put it down and turned back.
The third time, I walked 334 kilometers with 1000, leaving 666. Now I add the first two times, one *** 1998.
Carry 999 for the fourth time, walk 500 kilometers and there are still 499 left. Put it down and turn around.
The fifth time, I carried 999 on my back and walked 500 kilometers, leaving 499. Now I add the last ***998.
Carry 998 for the sixth time 167 km to the finish line, with 832 left.
Note 4. There seems to be another abnormal practice! Donkeys don't eat radishes unless they move things, haha ~
The first batch shipped 1 0,000 pieces, left 1 km and ate one piece, then threw away two pieces twice, leaving only three pieces in 333 km.
The second batch carried 1000 pieces to 333 kilometers or 1000 pieces (lost for the first time! ), keep walking, one at a time.
If you eat one and drop one per kilometer, you may have walked 500 kilometers, but the radish is gone. Turn around.
The third batch carried 1000, and walked 833 kilometers, which is 1000 (I lost it the first time and the second time! ), and finally take 167.
It's 833 kilometers from the station.