What always comes into a house through the keyhole?

Count the number of triangles in the below picture?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

How can a man go eight days without sleep?

What do you see here? Your task is to find three words hidden in the optical illusion

What is the word or phrase?

A spaceship was lost. The detective was given a piece of paper. This was the location of the spaceship! This is what the slip had scribbled on it:
Juice, Umbrella, Potato, Ice, Tomato, Elephant, Rice.

Where is the spaceship?

Outside a massage parlour, there is a board that reads
"I only massage those who do not massage themselves."

Reading the above statement, does the masseur massage himself?

How high do you have to count before you use the letter “a” in the English spelling of the whole number?

Can you find the largest Three-digit number whose sum is 14 and whose square is less than 5,00,000?