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

[EX Q]: Tapirs have hoofed toes, with four toes on the front feet and _ toes on the hind feet.
[EX A]: three

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

[EX Q]: Bedbugs can live for _ months without feeding.
[EX A]:
six