Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

Q: Fire occurs any time ____ elements are present - fuel, heat, oxygen and the chemical chain reaction.

A: four
****
Q: Prairie dogs bear four or ____ young per litter.

A: five
****
Q: Autism affects ____ times as many males as it does females.

A:
three
****