TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Titanium is found in column _ along with chemically similar zirconium, hafnium, and thorium.

SOLUTION: four

PROBLEM: Human sperm comes in _ varieties, mixed.

SOLUTION: three

PROBLEM: Death occurs after ingestion of _ grams of quinine.

SOLUTION:
eight