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: Fitness has ____ components, aerobic and muscular.

SOLUTION: two

PROBLEM: Blood Parrots are a hybrid of ____ Cichlids species.

SOLUTION: two

PROBLEM: Northern bettongs live for around ____ years.

SOLUTION:
six