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

[Q]: Children can age an adult faster than _ years in prison.
[A]: ten


[Q]: Cigarette smokers have up to a _ times higher incidence of bladder cancer than non-smokers.
[A]: four


[Q]: Physicians often implant _ or five embryos.
[A]:
four