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.

Q: Kayak paddles have ____ blades, canoe paddles have one.

A: two
****
Q: Moths are most active during the first three to ____ hours of darkness.

A: five
****
Q: All regular quadrilaterals have ____ right angles.

A:
four
****