TASK DEFINITION: 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.
PROBLEM: Pyrimidines contain ____ ring and purines contain two rings.

SOLUTION: one

PROBLEM: Rodents contaminate ____ times more food than they eat.

SOLUTION: ten

PROBLEM: Some signs have as many as ____ different coats of color.

SOLUTION:
nine