When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

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?

In an Art Gallary, When the clock hit 11 am, Artist hung the painting number 30. When it struck 4 pm, he hung painting number 240 and when it struck 7:30 pm, he hung painting number 315.

Can you determine, which painting number will he hang when the time is 9:20 pm?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

Prove that the below maths equation is true.

8 + 8 = 91

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

I have branches, but no fruit, trunk or leaves. What am I?

What goes through cities and fields, but never moves?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

You are playing as white and given four rooks to checkmate the black king in four moves with the following rules 1. You can place one rook every move and ensure the black king should be in check position.2. After four moves the black king should be in the checkmate position.