Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

I’m tall when I’m young, and I’m short when I’m old. What am I?

Be active and find the killer in the picture Riddle below.

What's the only room from which no one can enter or leave

You are in a room with no metal objects except for two iron rods. Only one of them is a magnet.
How can you identify which one is a magnet?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

If I put in one bird per cage, I have one bird too many. If I put in two bird per cage, I have one cage too many. How many cages and birds do I have?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.