If six children and two dogs were under an umbrella, how come none of them got wet?

I have Rs.50 and I spend it in the way as below.

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

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

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

Can you move 2 matchsticks to form four equal sized squares.

Can you start the fire using two pieces of wood?

You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?

There is a basket full of hats. Three are white and two are black. Three men, Tom, Tim, and Jim, each take a hat out of the basket and put it on their heads without seeing the hat they selected or the hats the other men selected. The men arrange themselves so Tom can see Tim and Jim’s hats, Tim can see Jim’s hat, and Jim can’t see anyone’s hat. Tom is asked what color his hat is and he says he doesn’t know. Tim is asked the same question, and he also doesn’t know. Finally, Jim is asked the question, and he does know. What colour is his hat?