1 -1-100
2- 101-200
3 – 201 -300
4- 301- 400
5 – 401- 500
6- 501-600
7- 601 -700
8 – 701- 800
9 – 801- 900
10 – 901 – 1000
11 – 1001 – 1100
12 – 1101 – 1200
13 – 1201- 1300
14 – 1301- 1400
15 – 1401 – 1500
16 – 1501- 1600
17 -1601 -1700
18- 1701 – 1800
19 – 1801 -1900
20 -1901- 2000
21- 2001-2100

Not 2100 – 2200

The “1” when counting , for example in 101 above, is really important

A total confusion, all the calculation above are wrongfully analyse. When there are no year call 0, the 0 year didn’t started in this generation. The beginning of numbers are follows…0,1,2,3,4,5,6,7,8,9,10,

11,12,13,14,15,16,17,18,19,20,21,22.

The 0 number years was after BC & A.D.

From 1,2,3…19,20,21. etc are the conventional year and century counting.

Remember, the 0 years was 1 to 999 years was A.D. After Death.

So the 0 to 999years was not counted. But instead it was call B.C & A.D

From 1 onward, the century begin
1 called 1st century =100years,
2 called 2nd century = 200years,
3 called 3rd century =300years,
4 called 4th century = 400years, etc till
10 called 10th century = 1000years
11 called 11th century = 1100years, etc till 18 called 18th century = 1800years
19 called 19th century = 1900years
20 called 20th century = 2000years

that is 1900 to 1999, the 19th century completed. The century is the 19th And not 99.
2000 to 2099, the 20th century completed.

Remember….
12th year, 12th century, that is, 1200 to 1299. The century is the 12th.

13th, 14th…till 19th which should be 19 century and written as 1900 to 1999. The century is the 19 and not 99.

20th century which is 20xx or 2000 to 2099. The century is the 20th.

21st which should be 21 century, 2100 to 2199. Counting from 00 to 99 makes 100… The century.

So my conclusion is that, the said century to be recognized or used is wrong. The year 2022 we’re presently falls in 20th century and so it is not 21st century.

Take more examples,
19 hundred = 1900 = 19thCent
20 hundred = 2000. = 20thCent
21 hundred = 2100. = 21stCent. Etc

The hundred is the years in within 0- 99=100

And the owner of each Cent is the 19,20,21,22…etc.

If any mistake, questions or explanation.

johnamosabiodun@gmail.com