If it took eight men ten hours to build a wall, how long would it take four men to build it?

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?

I look at you, you look at me I raise my right, you raise your left. What am I?

What Time Should the last watch show in the below figure?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

A monk has a very specific ritual for climbing up the steps to the temple. First, he climbs up to the middle step and meditates for 1 minute. Then he climbs up 8 steps and faces east until he hears a bird singing. Then he walks down 12 steps and picks up a pebble. He takes one step up and tosses the pebble over his left shoulder. Now, he walks up the remaining steps three at a time which only takes him 9 paces. How many steps are there?

It is a nine-letter word.
The exact opposite of the phrase "friendly and outgoing"
It contains the word "over".
It starts will a vowel.

What is it?

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

Can you think of any three-dimensional shape that comprises of exactly two surfaces?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?