What does this Rebus Picture mean?

Solve the counting riddle by identifying the number of triangles in the given picture.

How old is your son? asked a man to his neighbour. My son is five times as old as my daughter and my wife is five times as old as my son. I am twice as old as my wife whereas my grandmother, who is celebrating her eighty-first birthday is as old as all of us put together.

How old is the man's son ?

How many Watermelons are there in the below picture?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

I go up and I go down.
I go up towards the beautiful sky and down toward the green ground.
I am present tense.
I am past tense too
Children love me.

Who Am I?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

You have two rectangular wires.

Both of them have property that when you light the fire from one end , it will take 60 minutes to get completely burn.

However, they do not burn at consistent speed (i.e it might be possible 1st 20% burn in 50 minutes and 80% can burn in 10 minutes).

So how could you measure 45 minutes ?