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: Threshold is a value to avoid ____ divide.

SOLUTION: zero

PROBLEM: Penile cancer occurs almost exclusively in the uncircumcised male at a rate of ____ per million.

SOLUTION: eight

PROBLEM: Sticklebacks make up ____ genera, most of which have just one species.

SOLUTION:
five