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

They are three errirs in this question. Can you find them?

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

A bus driver was heading down a street in Mexico. He went right past a stop sign without stopping, he turned left where there was a "no left turn" sign, and he went the wrong way on a one-way street. Then he went on the left side of the road past a cop car. Still - he didn't break any traffic laws. Why not?

Can you find the missing piece of the Porsche?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?

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

what does the below rebus means?