Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

Count the number of times the letter "F" appears in the following paragraph:

FAY FRIED FIFTY POUNDS OF
SALTED FISH AND THREE POUNDS
OF DRY FENNEL FOR DINNER FOR
FORTY MEMBERS OF HER FATHER'S FAMILY.

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

A non-stop marathon is the shared favourite sport of three brothers.

*The oldest one is fat and short and trudges slowly on.
*The middle brother's tall and slim and keeps a steady pace.
*The youngest runs just like the wind, speeding through the race.

"He is young in years, we let him run!" the other two brothers explained, "'because though he is surely number one, he is second, in a way." Why is it?

Who can jump higher than a Mountain?

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

Can you solve this amazing hard number series problem?
7, 8, 10, 12, 16, 18 ?

Twenty frogs are sitting on a log floating on the surface of a river. Two of them decide to jump off into the water.

How many frogs are there on the log at this moment?

In the following picture, E is going to slide the object down and as per the terrain and the physics, the round object is going to travel all the way till the end. Now, can you analyze who all people will die when it happens?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?