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.

[EX Q]: Elephants give birth to ____ calf every four to nine years on average.
[EX A]: one

[EX Q]: Differentiation is caused by the energy going in ____ directions.
[EX A]: two

[EX Q]: Vision tends to improve until it stabilises around the age of ____ or six.
[EX A]:
five