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.

Studies show that childhood obesity is epidemic and that one in ____ children is overweight.
five

Photosynthesis has ____ main sets of reactions.
two

Black women giving birth have a four to ____ higher rate of mortality than white women do.

one