Below is the sum of symbols in each row and column in the figure. Analyzing the figure, can you find out the value of the symbols?

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

I don't get anymore wetter, no matter how much rain falls on me.

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

Can you tell a 3D object that has just two surfaces?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

Identify the hidden meaning behind this picture?

A boy was at a carnival and went to a booth where a man said to the boy, "If I write your exact weight on this piece of paper then you have to give me $50, but if I cannot, I will pay you $50." The boy looked around and saw no scale so he agrees, thinking no matter what the carny writes he'll just say he weighs more or less. In the end the boy ended up paying the man $50. How did the man win the bet?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?