A little girl goes to the store and buys one dozen eggs. As she is going home, all but three break. How many eggs are left unbroken?

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?

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

Can you divide the below-given shape into four equal and identical pieces?

Divide 110 into two parts so that one will be 150 per cent of the other. What are the 2 numbers?

Can you divide numbers from 1 to 9 (1 2 3 4 5 6 7 8 9) into two groups so that the sum of the numbers of each group is equal?

Note: 9 cannot be turned over to make it 6.

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

With the help clues provided in the image, can you find the 5 digit key?