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]: Aquatic adults have prominent red reathery gills, are large, and have _ toes on each foot.
[EX A]: four

[EX Q]: All atoms attempt to achieve the stable configuration of _ electrons in the outer most shell.
[EX A]:
eight