This one is fairly easy if you use elimination if you follow all the first 5 steps you get three options: 525, 327, and 723 but if you followed the last step you would reach your answer. The answer was 327.

2. Because if the lions hadn’t eaten for five years, they would be dead.

The same three cats would do. Since these three cats are averaging one mouse per minute, given 100 minutes, the cats could catch 100 mice.

Absolutely nothing, as 80 minutes equals an hour and twenty minutes.