No one wants to have it, but if one got it, he does not want to lose it. What is It?

A brand new Mobile Phone was on sale at 20% as a promotional offer. By what per cent must the Mobile price be increased to sell it at the original price again?

How many bricks does it take to complete a building that is 15 feet wide, 30 feet deep, and 12 feet tall made of brick?

I am eight letters long - "12345678"
My 1234 is an atmospheric condition.
My 34567 supports a plant.
My 4567 is too appropriate.
My 45 is a friendly thank-you.
My 678 is a man's name.

What word am I?

Can you find out the remainder when 3^300 is divided by 5?

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

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?

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

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

How can you take 2 from 5 and leave 4?