If two's company, and three's a crowd, then whats four and five ?

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?

The answer I give is yes, but what I mean is no. What was the question?

There are three boxes. One is labeled "APPLES" another is labeled "ORANGES". The last one is labeled "APPLES AND ORANGES". You know that each is labeled incorrectly. You may ask me to pick one fruit from one box which you choose.

How can you label the boxes correctly?

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?

what does the below math rebus puzzle mean?

What do you think with the below Picture ?

Find the Odd One Out?
84129
32418
47632
36119
67626
72927

The dirtier I get, the whiter I look. Who am I?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?