First, it takes 12 hours to complete a job. A can do it for 8 hours first, and B can do it for 6 hours. "We can know that 6A+ 12B = 8A+62B, and we can get 2A = 62B. Then we can draw that the total workload is 6A+ 12B = 10A. A did it for 3 hours first, so there is 10 A -3 A =7 A, and 2 A =6 B, so 7 a = 2 1 B. So B has to do 21hour.

Second, because one toffee is already milk-flavored, the possibility that another toffee is toffee is 1 = 1/3.

Finally, the buddies upstairs are so funny. However, there is still something to learn from.

The questions are as follows: the first question, regardless of the first two zeros, is that people who are sensitive to numbers see 1 1 square-1 or 5 cubic meters, and see 1 1 square minus 1, then 60. And three sides of 5 minus five, then 60 is three sides of 4 minus four, and 24 equals three sides of 3 -3, and the following rules are the same. Although the answer is the same, the thinking is wrong and two zeros are ignored.

The second question, looking at the increasing range of power, is that 45 square is equal to 2025, 20 17=2025-8.7 square -4=45. The following rules naturally followed, and the idea of answering questions upstairs was so tangled. Of course, the answer is that it is more convenient to use mantissa.