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]: Photons have ____ mass and no electrical charge.
[A]: no


[Q]: Osteoporosis affects one in three women and one in ____ men.
[A]: ten


[Q]: Many scientists consider ____ subspecies of brown bear.
[A]:
two