What number do you get when you multiply all of the numbers on a telephone's number pad?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
----------

What does below chemistry rebus means?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

You walk into a room where there are three primates held in their respective cages:
1) A lion who is eating the flesh of a goat.
2) An orangutan who is playing with blocks.
3) A donkey who is sitting idle.

Who is the most intelligent primate in the room?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

What you cannot hold but it is yours?

You are given a cube that is made with the help of 10x10x10 smaller cubes summing up to a total of 1000 smaller cubes. You are asked to take off one layer of the cubes.
How many remain now?

Christina, Allison and Lena are 3 daughters of John a well-known Mathematician, When I asked John the age of their daughters. He replied "The current age of her daughters is prime. Also, the difference between their ages is also prime."

How old are the daughters?