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

[EX Q]: Figure skating is like flying, but it's also like climbing hundreds of stairs in _ minutes.
[EX A]: four

[EX Q]: Cubs stay with their mothers for up to _ years.
[EX A]: three

[EX Q]: Hard disks are an addiction _ less than heroin.
[EX A]:
no