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

Q: Placental abruption is _ times more likely to occur in a multiples pregnancy.

A: three
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Q: Metals often crystallize in a _ dimensional version of the hexagonal closest packed structure.

A: three
****
Q: Mages can select from _ spheres of magic - fire, water, air, earth and astral.

A:
five
****