Peny has 81 red balls, which she wants to arrange in rows. If the number of balls in each row must be equal to the number of rows, how many balls must there be in a row
A 3
B 7
C 9
D 11

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu

Of the total number of spectators at a circus show, 1/4 are men. 2/5 of the remaining number of spectators are women. there are 132 women at the circus show. how many children are at the circus show?

On average, a continental shelf drops 0.12 m per 100 m. at 22.5 m from the shoreline, how much distance has the continental shelf dropped?