What is the centre of gravity?

My grandson is about as many days as my son in weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years ?

We know that the number 7 is the prime followed by a cube. Which next number is also a prime followed by a cube?

When monkey rotate the gear, which mark will be hit 1 or 2 ?

In a supermarket, there is an intelligent glass pane before a refrigerating unit. This glass pane allows cherries and apples through it but does not allow grapes and Orange to pass through it.

Can you identify the rule that the glass pane is following?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

A very interesting trivia question for all.

Why do men's shirts have their buttons on the right side and women's have buttons on the left-hand side?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?