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.

Natural ytterbium is a mixture of ____ stable isotopes, with seven other unstable isotopes known.
seven

Autism affects ____ times as many males as it does females.
three

Women purposely injure themselves ____ to four times more often than men.

three