How many ways can 4 people be seated around a circular table with 4 identical chairs?

Baskin robins offers 31 flavors of ice cream. How many triple scoops can be chosen if order of flavor doesn't matter and no flavor can be repeated?

A grocer has a triangular display of oranges in a window.  There are 18 oranges in the bottom row and the rows decrease by one in each row.  How many oranges are in the display? Give the total number of oranges below.

A total of 1254 people attend a basketball team's championship game. There are six identical benches in the gymnasium. About how many people would you expect each bench to seat?

School A had 10% more students enrolled than school B. Due to some redistricting 12 students from school A to school, now the schools have the same number of students. How many students are now in school B?