I have feet, but no legs. Which animal Am I?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

There are 2 people near the river and both of them want to get on the other side. The boat can only take one of them. But they got across.
How?

Find the missing letter in the last circle logically in the given below picture.

A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

For example, if he gives $x to the youngest child, he will give $(x+2) to the next one, $[(x+2) + 2] to the next one and so on.

Can you find out how much did the youngest one receive?

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

Which wheel of car does not rotate when you turn your car right?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

What's the only room from which no one can enter or leave

Count the Triangle in the figure given below: