The sandyville school 5th graders were doing a play. There was a big dance scene with dancers in rows. Use these hints to figure out how many dancers were there. 1) there were 40 fifth graders in school, but they did not all dance. 2) when the dancers rehearsed in rows of 2, one dancer was left to dance alone. 3) when the dancers rehearsed in rows of 3 , two dancers were left to dance together. 4) when the dancers rehearsed in rows of 4, three dancers were left to dance together. 5) when the dancers rehearsed in rows of 5, finally every dancer was in a row. How many dancers could have been in the dance scene? Explain how you got your answer.