How can you make the following equation true by drawing only one straight line: 5+5+5=550 ?

I am under you when I am whole.
I shift above you if you remove the first letter.
I come all around you if you remove the second as well.

Can you tell me who I am?

Which tank will fill first?

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

What has many teeth, but cannot bite?

What does this below rebus puzzle mean?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.