Posted by **James** on Saturday, March 10, 2012 at 11:22pm.

This problem pertains to Cuisenaire Rods:

1-white

2-red

3-green

4-purple

5-yellow

6-dark green

7-black

8-brown

9-blue

10-orange

Question:

(a) If an all-brown train is equal in length to an all-orange train, what can be said about the number of brown rods compared to the number of orange rods?

(b) If a number can be represented by an all-red train, and an all-black train, it has at least eight factors. Name these factors.

(c) What is the smallest number of red rods for which an all-red train is equal in length to an all-blue train?

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