The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

Count the number of triangles in the given picture.

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

What does below rebus means ?

What can go up a chimney down, but can’t go down a chimney up?

In Greek mythology, the Sphinx sat outside of Thebes and asked this riddle of all travellers who passed by. If the traveller failed to solve the riddle, then the Sphinx killed him/her. And if the traveller answered the riddle correctly, then the Sphinx would destroy herself. The riddle:

What goes on four legs in the morning, on two legs at noon, and on three legs in the evening?

Oedipus solved the riddle, and the Sphinx destroyed herself.

John, a 5-year-old boy, was really fond of the chocolates. He asked his Mother to give him some money to buy his favourite chocolates. His Mother gave him $45. He went to the shopkeeper and asked, "How much is one chocolate for?". The shopkeeper said $3 for one chocolate. Also, if you give me the wrappers of three chocolates, I will give you one for the exchange.
In total, how much chocolate could John eat?