A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

People put me on the table and cut me but do not eat me. What am I?

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

Forwards I am heavy, backward I am not. What am I?

Why is the Hole below a Lock?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Jack was having a candle light dinner with his girlfriend. Suddenly a cold gush of wind entered through the open window and three of the ten candles were extinguished. Assuming that none of the other candles were extinguished.

How many candles are they left with in the end ?

Can you find the odd number in the following?

2716, 4135, 5321 and 7145

What makes this number unique: 8,549,176,320?