Math problem: several people line up, 3 people in each row, leaving 1 person; 5 people per line, the remaining 2 people; There are 7 people on each line, and the remaining 3 people. What is the minimum number of people in line? 1, the number divisible by 5 and 7 and 3 is 70; The number divisible by 3 and 5 and 7 is 45; The number divisible by 3 and 7 and 5 is 42. 70+45+42= 157.

The least common multiple of 2,3 and 5,7 is105;

3、 157- 105=52