Current location - Training Enrollment Network - Mathematics courses - Help me get into the math group.
Help me get into the math group.
At least 25 19 people.

Obviously, if the number of people exceeds 1, then the tables for 3, 5, 7 and 9 people will be full. At this time, the number of people is the common multiple of 3, 5, 7 and 9.

Least common multiple = 5*7*9 = 3 15

Then we know that the primitive number = 3 15K- 1 can be divisible by 1 1.

315k-1= 28 * 1 1 k+7k-1divisible by11,that is,

7K- 1 is divisible by 1 1, then the enumeration method k is at least 8.

There are at least 315 * 8-1= 2519 people in the room.

5*7*9* 1 1=3465, so the number may be 3465P+25 19.