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

[EX Q]: Monsoons coming every three to _ years can add almost a foot of water to the mountain's surface.
[EX A]: seven

[EX Q]: Clinical psychologists differ from psychiatrists in _ important ways.
[EX A]: two

[EX Q]: Figure skating is open to kids beginning at _ years of age and moving through various levels.
[EX A]:
three