PHP Interview Programs | Part 5

Problem 21:  How to print this Pattern:

*0
***00
******000
**********0000
***************00000

Problem 22: 

How to write a Floyd’s Triangle?
1
23
456
78910
1112131415

Problem 23: 

Write a program to make a chess.

Problem 24: 

how to print following table as Output:

Problem 25: How to print following number table.

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