If 21x = 79x, what is the value of x?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?

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

What word does this rebus represent?

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Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

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?

How many times can you subtract the number 5 from 25?

How many triangles are there on the puzzle below?

Identify the movie name through below Rebus containing Pi Mouse and coconut tree..

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?