What's the only room from which no one can enter or leave

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

Who always enjoys poor health?

Prove that the below maths equation is true.

8 + 8 = 91

By what process could you make a 'Tea-Table' into food?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

By using 'because' continuously three times, can you make an English statement ?

What is at the end of a rainbow?

In a concert, Christina is performing a dance show with her group.
At 10:00, she and her crew were dancing in an absolutely straight line. At that time Christina was standing in 4th position from both the front and back end of the row.

What was the size of her crew?

Why is 6 afraid of 7?