what does the below rebus means?

Next Number in the Series,

5, 16, 49, 104, ?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

The current time can be represented by below textual rebus.

0
=========
B.Sc
LLB

Can you tell us the current time?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

Find the mistake in the below maths equations

A = 2
A(A-1) = 2(A-1)
A2-A = 2A-2
A2-2A = A-2
A(A-2) = A-2
A = 1

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

Replace the question mark with the correct number in below Picture: