What does this rebus means ?

PROG WORKRESS

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

Can you count the number of squares in the given picture?

Forwards I am heavy, backward I am not. What am I?

What occurs twice in a week, once in a year but never in a day?

How do you go from 98 to 720 using just one letter?

A little girl goes to the store and buys one dozen eggs. As she is going home, all but three break. How many eggs are left unbroken?

John is the son of Jacob.
So,
Jacob is the_____of John's father?

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?