What does this rebus means ?

PROG WORKRESS

A dying old man wants to divide his entire land between his only two sons. Since his only wish is to treat them as equal as both of them have been too good to him, he wants to divide his land equally between them. The problem is that the land is significantly irregular in shape and thus there is no choice of cutting them into two equal halves.

Can you help him divide the land in a manner that both of his sons will be happy?

What is common among 11, 69, and 88?

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?

Which letter of the alphabet has the most water?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

If 21x = 79x, what is the value of x?