Ateacher has a bag of 100 unit cubes. she gives a equal number of cubes to each of the 7 groups in her class. she gives each groups as many cubes as she can. how many unit cubes are left over?

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

If x is 6, then 7x= a. 13 b. 42 c. 42x d. 76