There are three boxes missing from the pencil box.
A box 100.
8. The number of girls who won the prize is more than half of the number of boys, so less than two girls is half of the number of boys. . The number of male students winning prizes is two more than that of female students, so when the number of male students winning prizes is two less than that of female students, there are four more, that is to say, the number of male students winning prizes is more than half of that of male students, and four more than half is four, that is, eight male students and six female students.
9. For two pieces of cloth with the same length, the first piece used more12m, and the rest was less than the second piece12m.
Now the second block is three times as big as the first block, so the first block is twice as small as the second block, corresponding to 12 meter.