What always comes into a house through the keyhole?

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

What is the word or phrase below?
R | E | A | D

What do you think with the below Picture ?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

Can you solve the below tricky visual equation?

When we see 2 but call 10?

What animal walks on four legs in the morning, two legs during the day, and three legs in the evening?

Oedipus, the king of Thebes, figured out the answer to the riddle:

In the attached figure, you can see a chessboard and two rooks placed on the chess board. What you have to find is the number of squares that do not contain the rooks. How many are there?