I shave every day, but my beard stays the same. What am I?

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

The sum of a mother, her baby and her dog's weight is 170 Kg. How much does the baby weigh if the mother weighs 100 kg more than the combined weight of the baby and the dog, and the dog weighs 60 per cent less than the baby?

What does below pictogram mean?

What is black when you buy it, red when you use it, and gray when you throw it away?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

For an extra income, John decided to work at a Hotel for one hour daily. The manager offers him that they will pay him $11 after every 11 days.
However, John offered a different proposition to the manager. The offers stand as:
He will be paid just a penny on his first day.
Two pence will be paid on the second day,
Four pence will be paid on the third day.
And so on till the 11th day.

Should the Hotel manager accept his offer?

Find the hidden tiger in the given optical illusion ?

What Does this text mean:

important=important

A man calls his dog from the opposite side of a river. The dog crosses the river without a bridge or a boat and manages to not get wet. How is this possible?