If you have 42 treaties they can be divided into 6 groups with 7 treaties in each group or 7 groups with 6 in each. No smaller number of treaties can be divided into groups of 6 or 7.
The smallest number which is exactly divisible by the numbers 8 9 and 10 is 360.
12
339 + 1 = 340,which is exactly divisible.
10080
It is: 30
1260
It is: 10152
27720
2
10080
13
27720