Can you place three balls such that the equation shown in the picture holds true?

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

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 ?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

A woman lives in a skyscraper thirty-six floors high and is served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

What does this below rebus puzzle mean?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

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.

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

What work can one never finish?