using four eights (8) and a one (1) and one mathematical symbol , create the number 100

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

Before Mount Everest was discovered, what was the highest mountain in the world?

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

Count the Triangle in the figure given below:

A man is found dead in his bathroom naked with blood scattered all around him. The bathroom was locked from the inside and there is no trace of any struggle. There is nothing in the bathroom except his pant with the belt still around and his shirt. Also, the medic team can't find any incision in his body that may have been the reason behind so much blood loss.

The Police department is clueless regarding this murder mystery.
Can you?

A father's child, a mother's child, yet no one's son.

Who am I?

Two men play a dice game involving roll of two standard dice. Man X says that a 12 will be rolled first. Man Y says that two consecutive 7s will be rolled first. The men keep rolling until one of them wins.

What is the probability that X will win ?