Which is the smallest number that you can write using all the vowels exactly once?

I am the fastest animal but cannot climb the tree. What am I?

What is the word or phrase?

What country can make you shiver?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

When 99 is considered higher than 100?

How can you take 2 from 5 and leave 4?

Spot 5 differences in two Christmas tree below:

Using the clues below, what four numbers am I thinking of?

The sum of all the numbers is 31.
One number is odd.
The highest number minus the lowest number is 7.
If you subtract the middle two numbers, it equals two.
There are no duplicate numbers.

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?