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

[EX Q]: Muslim men can divorce by simply pronouncing triple talak and can have up to _ wives.
[EX A]: four

[EX Q]: College students are _ times more likely to become infected than healthy adults.
[EX A]: five

[EX Q]: Chemicals generally form _ kinds of hazards, physical and health.
[EX A]:
two