What does this rebus means ?

PROG WORKRESS

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

There are two candles. Both will only burn exactly for an hour. How will you use these two candles to measure forty-five minutes?

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?

You bought me for dinner but never eat me. What am I?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?

Find the number of squares in the below-given picture.

Can you count the number of blocks in the picture below?