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?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

What is the word or phrase?

Find the missing letter in the last circle logically in the given below picture.

Assume there are approximately 5,000,000,000 (5 billion) people on Earth. What would you estimate to be the result, if you multiply together the number of fingers on every person's left hand? (For the purposes of this exercise, thumbs count as fingers, for five fingers per hand.) If you cannot estimate the number then try to guess how long the number would be.

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

A bus driver was heading down a street in Mexico. He went right past a stop sign without stopping, he turned left where there was a "no left turn" sign, and he went the wrong way on a one-way street. Then he went on the left side of the road past a cop car. Still - he didn't break any traffic laws. Why not?

Find the next number in the series.
1 10 24 43 67 ?

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

How can you tell a raw egg from a hard-boiled egg?