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

[EX Q]: Rats multiply _ times as fast as cats.
[EX A]: four

[EX Q]: Elk are more than _ times the size of deer.
[EX A]: three

[EX Q]: Tumors usually shrink within one to _ days of therapy.
[EX A]:
two