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

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

Two fathers and two sons decided to go to a shop and buy some sweets upon reaching. Each of them bought 1 kg of sweet. All of them returned home after some time and found out that they had 3kg of sweets with them.

They did not eat the sweets in the way, nor threw or lose anything. Then, how can this be possible?

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

When is the top of a mountain similar to a savings account?

Rearrange the letters in "new door" to make one word.

how come the second man dies?

What does the below rebus riddle means?

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?