Given a sentence, fill out the missing word with a 'no' or a number (between zero and ten). You should write the numbers with english alphabet, like: four instead of 4.

[Q]: Human gestation is divided into three trimesters of ____ months each.
[A]: three


[Q]: Cardiovascular disease is the cause of more deaths than the next ____ causes of death combined.
[A]: seven


[Q]: Neutrons contain ____ up quark and two down quarks.
[A]:
one