The aquarium opens at 10 o’clock in the morning and closes at 8:30 in the evening. How many hours is it open?

Written By P. Roland
P. Roland
Previous

A special tour was scheduled to start at 5 o’clock in the afternoon but started a half an hour late. If the tour ended at half past seven in the evening, how long did the tour last?
Next

30 birds were sitting in a tree. Some more fly up to the tree. Then there were 142 birds in the tree. How many more flew up to the tree?