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: Water consists of ____ hydrogen and one oxygen atom.

SOLUTION: two

PROBLEM: Jersey has nine breeding seabird species, of which ____ nest on the north coast.

SOLUTION: seven

PROBLEM: Giraffes have two horns and ____ or three knobs.

SOLUTION:
two