There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

Three fair coins are tossed in the air and they land with heads up. Can you calculate the chances that when they are tossed again, two coins will again land with heads up?

What does below pictogram mean?

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

I’m tall when I’m young, and I’m short when I’m old. What am I?

If EELS + MARK + BEST + WARY = EASY

What does HELP + BARK + WARD + LEAD equal?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

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

One absent-minded ancient philosopher forgot to wind up his only clock in the house. He had no radio, TV, telephone, internet, or any other means for telling time. So he travelled on foot to his friend's place a few miles down the straight desert road. He stayed at his friend's house for the night and when he came back home, he knew how to set his clock. How did he know?

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?