How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

There’s a girl who has a large family. She has an equal amount of brothers and sisters, but each brother only has half as many brothers and sisters. What’s the correct amount of brothers and sisters?

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

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

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

There were five men at church, and it started raining while they were outside. The four that ran still got wet, but the one that was still stayed completely dry. Why did he stay dry?

Can you solve the below algebraic mathematical equation?

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

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

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?