2, lush: 1 kg onion =0.5 kg onion +0.5 kg onion (for example) Now 1 kg onion is 1 yuan.
Onion =0.5*0.7+0.5*0.3=0.5 yuan will lose half if he buys separately as the boss says (a catty of white and a catty of green should be twice the unit price of onion).
If you start climbing during the day, you can reach the mouth of the cave in five days, but it will take six days if the logic is strict. At the moment of touching the line, he began to slide down again,1+1+1+1+65438+6553.
4. 1 block = 10, (3 is 1) 3 (residual 1 core) 1 (3 is 1 core) (residual 1 core)/kloc.
5. Weigh eight balls for the first time. If the ball is balanced, the problem ball is among the four unweighted balls. Step 2: Take out three of the four balls and put them aside, and take three normal balls from the other side. If it is flat, the ball is the one that has not been weighed, otherwise it is one of the three balls that have been picked up. And if these three balls are heavier than the three normal balls, the problem ball is heavy, otherwise it is light. Step 3, weigh two of the three. If it's flat, it's the rest. If it is uneven, you can know whether the problem ball is critical or light according to whether the ball obtained in the second step is heavy or light.
If it is the first imbalance, write down which four are heavy and which four are light. Take out three of the four heavy balls for the second time, add a light ball to the left, and put the remaining heavy balls on the right with three normal balls, so that if the left is heavy, the problem ball is among the three heavy balls on the left and heavier than the normal ball, because the three balls on the right are normal balls, and if the remaining one is heavier than the normal ball, it should be on the right, not on the left. If the right side is heavy, the problem ball is the only heavy ball on the right side. If it is balanced, it means that not all the weighed balls are normal, and the problem ball is not a heavy ball, but a light ball, and it is one of the three light-edged balls that are not weighed.
In this way, the third weighing is to know which three balls have problems, whether they are overweight or underweight. Just weigh two balls. If it is balanced, it means that the ball is not weighed. If it is unbalanced, you can find out whether it is an underweight or overweight ball (copy) according to the conclusion reached in the second step.
6,400 times (the first 400 minutes, three times, and then the last 600 times of walking)
seven
8. Is the big island on the mountain? Did Nakajima lie? Ask Nakajima if Kojima lied? Did he raise his right hand? ()
Know if Kojima is lying.
2) Know whether Nakajima is lying.
2) Know whether Oshima is lying.