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.

[EX Q]: Nymphs are less than ____ millimeters in size.
[EX A]: two

[EX Q]: Neurofibromatosis appears in ____ forms.
[EX A]: two

[EX Q]: Planes work in ____ dimensions, but a boat is limited to two.
[EX A]:
three