Math Intervention 3–5 Grade

Multifaceted Number Concepts 205

Rigorous Problem Solving with the Concept of
Prime and Composite Numbers 2

The game Prime Time requires players to draw factor trees for
composite numbers.

Kirk drew this factor tree for the number 24.^24

64

2223

Part C

If there are 24 guests and we need to arrange an even number
of chairs at each table, how many different ways could we
arrange the chairs?

Part A

Which numbers in Kirk’s factor tree are composite?

o 6, 4, 2, 3, 2, 2
o 2, 3
o 2, 3, 6, 4
o 24, 6, 4, 2, 3
o 24, 6, 4

Part B

Is there another way to draw a factor tree for the number 24?
If so, draw it.