The side length is 30, so you can cut two.

2

192

three

12 and multiples of 12, such as 12 24, 12 36, etc.

four

Divisor of 30 and 30, such as 30 1, 30 2, etc.

five

49 25 49 * * 4, the largest is 49.

six

7/ 10,4/5,5/6

The fastest and least is the first.

seven

49/2

eight

45,20

nine

(2+5+3+ 1 1+ 13+ 17+ 19)/7= 10

10

Third place in 1997

1 1

32

12

twice

13

seven

14

1200836 yuan

15

60 days later, March 2.