Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

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's a single-digit number with no value?

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

Solve the alphametic puzzle by replacing the alphabet with the number.

S T O R M +
S O L E S
=========
T O W E L
=========

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

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

Can you find the 09 errors in the picture below?

Which English verb becomes past tense just by rearranging the letters?

Which of the below owl is odd one out?