posted by James .
This problem pertains to Cuisenaire Rods:
(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?
wow, haven't seen Cuisenaire Rods since the early 60's
Don't tell me they are still using these.