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

[EX Q]: Placental abruption is _ times more likely to occur in a multiples pregnancy.
[EX A]: three

[EX Q]: White sturgeon inhabit _ large river systems, all on the western coast of North America.
[EX A]: three

[EX Q]: Merlin is about five and _ half inches long.
[EX A]:
one