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

It belongs to you, but other people use it more than you do. What is it?

I am something people love or hate. I change peoples appearances and thoughts. If a person takes care of them self I will go up even higher. To some people I will fool them. To others I am a mystery. Some people might want to try and hide me but I will show. No matter how hard people try I will Never go down. What am I?

If we add four times the age of John four years from now to five times his age five years from now we get ten times his current age.

How old will John be two years from now?

A frog is at the bottom of a 30-meter well. Each day he summons enough energy for one 3-meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?

Count the number of triangles in the picture below:

What word is represented by this rebus?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

I am lying and I always lie. Tell me whether I am lying or telling the truth.

How do you go from 98 to 720 using just one letter?