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?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

What four weights can be used to balance from 1 to 30 pounds?

Can you find the ages of a son, father and grandfather based on the following facts?
The sum of the ages of grandfather, father and son is 140 years.
The age of the son in months is the same as the grandfather in years.
The age of the son in days is the same as the father in weeks.

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

What word does this rebus represent?

meta meta
meta meta

I am a prime number.
The double of myself is equal to the square of me.

which number am I?

I am sometimes honest
Sometimes dishonest
I can be sweet and also bitter
I can hurt you real bad and
also make u smile and blush ☺️
What am I?

There is something which is always coming but never arrives?