The more of this there is, the less you see. What is it?

Andrew sees a very rare bird named "Ruppell's vulture". Soon Andrew was dead. Can you explain the mystery, Mr. Sherlock?

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

Find the missing number in the sequence below:

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

What is the value of 1/2 of 2/3 of 3/4 of 4/5 of 5/6 of 6/7 of 7/8 of 8/9 of 9/10 of 1000?

Why do you find that most of the buildings are deprived of the 13th floor?

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

If "P" means "-", "Q" means "/", "R" means "+", and "S" means "*" then find the value of the following:

21 Q 7 R 9 S 10 P 13

What have one eye but still cannot see?