What does this rebus means ?

PROG WORKRESS

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

Spot 5 differences in two Christmas tree below:

This is a most unusual paragraph. How quickly can you find out what is so unusual about it? It looks so ordinary, you'd think nothing was wrong with it. Actually, nothing IS wrong with it. But it is not as ordinary as you might think. If you think about it for a bit, you will find out why it is truly so unusual. So what is it? What is so unordinary about this paragraph?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

Can you count the number of triangles in the given figure?

Alpha is Beta's sister.

Gamma is a Beta mother.

Delta is Gamma's father.

Tango is Delta's mother.

Then,

How is Alpha related to Delta?

When my father was 31 I was 8. Now he is twice as old as me. How old am I?

Only one colour, but not one size,
Stuck at the bottom, yet easily flies.
Present in sun, but not in rain,
Doing no harm, and feeling no pain.
What is it?

What number comes next in the series?

5 15 5 18 5 24 14 20 _