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.

Every isometry is the composition of one, two, or ____ reflections .
three

Fuzzy logic is an attempt to combine the ____ techniques.
two

Hexadecimal codes are combinations of ____ numbers and letters that identify a specific color.

six