A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

A quarter is one-fourth of a dollar but Mr. John has changed the equation as below :

DOLLAR * 4 = QUARTER

Can you replace each letter with a digit to make the above solution correct?

No matter how little or how much you use me, you change me every month. What am I?

Can you decipher the two rows to find the hidden word?

A pack of cards has 40 cards. You are blindfolded. Out of 40, 25 cards are facing down while 15 are facing up. You have been asked to divide this pack of cards into two decks - so that each deck contains an equal number of face-up cards. Remember, you are blindfolded.

How will you do it?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

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

What begins with T, ends with T, and has T in it?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

Which country gets ill every time?