Our product and our sum always give the same answer. Who are we?

what does the below math rebus puzzle mean?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

Why is 6 afraid of 7?

You are in a land where thirty men and two women were dressed in classic black and white dresses.
They begin to fight as soon as any of them move.

Where are you?

The following "Brain Bat" means Slow Down.
S
L
O
W

Using the same logic, can you tell us what does the following Brain Bat means ?
E
V
I
G

If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

A man who was outside in the rain without an umbrella or hat didn’t get a single hair on his head wet. Why?

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

Complete the table series riddle by finding the number that can replace "??".