Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

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

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

A deaf and mute man goes to the train station. Tickets for the train are 50 cents each. The man goes to the ticket booth and hands the man inside just a dollar. The man in the booth hands him two tickets.

How did the man in the booth know to give him two tickets without even looking at him?

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

I have an eye but still cannot see.

Who am I?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.