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

A man has to get a fox, a chicken, and a sack of corn across a river.

He has a rowboat, and it can only carry him and one other thing.
If the fox and the chicken are left together, the fox will eat the chicken.
If the chicken and the corn are left together, the chicken will eat the corn.

How does the man do it?

Rearrange the letters in "new door" to make one word.

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

What word is represented by this rebus?