A square dance of the moms, 7 people 7 people the number of land remaining 4 people, 5 people 5 people the number of land remaining 3 people, 3 people 3 people the number of land exactly, how many moms jumping in the square?
This square square dancing at least 102 people, 7 people 7 people number of land remaining 4 people = 7 people 7 people number of land less than 3 people, 7 people 7 people and 5 people 5 people are poor three people, and 3 people 3 people number of land just right, are three. 7,5,3 of the smallest common multiple of 105, and then 105-3 = 102 (people)
Check dan hair test he lines of lone surprise phthalide supra-carcassing: 102 ÷ 7 = 14 (groups) ) ......4 (people), 102 ÷ 5 = 20 (groups) ......2 (people), if the number 21 groups, then 21 × 5-102 = 3 (people), 102 ÷ 3 = 34 (groups), there is no remainder. So 102 is correct.