Rectify the following equality 101 - 102 = 1 by moving just one digit.

Who has married many women but was never married?

There are three boxes of different sizes with three cupcakes inside each of the boxes in Christina's kitchen. At night her daughter wakes up and goes to the kitchen. She opens a box and eats all three cakes.

But in the morning Christina finds out that each box still had three cupcakes. How?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Can you spot the hidden girl in the picture below?

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 has many keys but can’t open a single lock?

How many triangles can you find in this given picture?

Your job is to measure 45 minutes if you have only two cords and matches to light the cords.

1. The two cords are twisted from various materials, so their different segments can burn at different rates.
2. Each cord burns from end to end in exactly one hour.

Describe your way of measuring the 45 minutes.

How can a man go eight days without sleep?