TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Pelycosaurs are a paraphyletic group of _ primitive families of synapsids.

SOLUTION: six

PROBLEM: Pharmacists dispense nearly _ billion prescriptions a year.

SOLUTION: three

PROBLEM: Ammonia is among the _ most abundantly produced chemicals in the world.

SOLUTION:
five