In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

Q: Every drug has _ names, a chemical name, a brand name, and an official name.

A: three
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Q: Autism is _ to four times more likely to affect boys than girls.

A: three
****
Q: Tardigrades are microscopic, water-dwelling, segmented animals with _ legs.

A:
eight
****