Find the value of "?" in the ball picture Riddle below:

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

Why do we preferably have round manhole covers and not square ones?

Can you figure out the logic I used to decide the order of the following words:
gun, shoe, spree, door, hive, kicks, heaven, gate, line, den

A sundial has the fewest moving parts of any timepiece. Which has the most?

Count the number of squares in the picture below.

Use the numbers 2, 3, 4 and 5 and the symbols + and = to make a true equation. Conditions: Each must be used exactly once and no other numbers or symbols can be used.