Two in a corner, one in a room, zero in a house, but one in a shelter. What is it?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

A man looks at a painting in a museum and says, “Brothers and sisters I have none, but that man’s father is my father’s son.” Who is in the painting?

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

Count the number of squares in the picture below.

The Puzzle: A girl, a boy, and a dog start walking down a road.

They start at the same time, from the same point, in the same direction.

The boy walks at 5 km/h, the girl at 6 km/h.

The dog runs from boy to girl and back again with a constant speed of 10 km/h. The dog does not slow down on the turn.
How far does the dog travel in 1 hour?

How can you leave a room with two legs and return with six legs?

Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

A professor thinks of two consecutive numbers between 1 and 10.
'A' knows the 1st number and 'B' knows the second number

A: I do not know your number.
B: Nor do I know your number.
A: Now I know.

What are the four solutions for this?