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

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

Find the next number in the series below.

6 18 270 72090 ?

John is pretty weird. He likes toffees but hates chocolates. He loves books but never reads. He likes to build his troops in an online game but does not proceed with the war. He likes to go swimming but is afraid of water.

Seeking this behaviour, can you tell whether he likes balloons and parties?

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 ?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

Can you spot the hidden girl in the picture below?

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

Replace the question mark in the picture below.