what does the below rebus means?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

People put me on the table and cut me but do not eat me. What am I?

A girl rode into a tourist spot out of the city on Thursday. She loved the place and decided to stay for a few days. She stayed for four days and then she left for back home on Thursday.

How can this be possible?

John and Jenni are a married couple. They have two kids, one of them is a girl. Assume safely that the probability of each gender is 1/2.
What is the probability that the other kid is also a girl?

Hint: It is not 1/2 as you would first think.

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

A man dies of old age on his 25 birthday. How is this possible?

If 1+9+8=1, what is 2+8+9?