instruction:
In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
question:
Happiness is _ kinds of ice cream.
answer:
two


question:
Titanium is found in column _ along with chemically similar zirconium, hafnium, and thorium.
answer:
four


question:
Lampreys have sucker mouths with rasp-like teeth and _ circular gill openings on each side.
answer:

seven