Multifaceted Number Concepts 217Rigorous Problem Solving with the Concept of
Finding Common Factors 1
Captain Kirk catches crabs in the bay.
Part B
On Tuesday, Captain Kirk went back to the bay for more
crabs. He steamed 21 extra large crabs and 49 large crabs.
He wanted to serve the crabs on trays so each tray will have
the same number of extra large and large crabs. What is the
greatest number of trays he can use to serve all the crabs?
Justify your answer.
Part A
On Monday he caught 40 male crabs and 20 female crabs.
Each person at the crab feast had the same number of male
crabs as female crabs without any crabs being left over. How
many people were at the crab feast?
List all of the possible total number of people at the crab feast.
© 2016, Math Intervention: Grades 3–5, Jennifer Taylor-Cox, Routledge