# Checking on a potential 'Mitty'

Join Date: Jan 2005

Location: N. Spain

Age: 75

Posts: 1,310

My number was W1941305 (Total 23)

Using Tinribs system, Post 91, it is correct. (A=1 etc) so (W=23)

Using Ricardian´s algorithm and discarding O and I the number calculated is 17 which corresponds to T

Help!!!

Using Tinribs system, Post 91, it is correct. (A=1 etc) so (W=23)

Using Ricardian´s algorithm and discarding O and I the number calculated is 17 which corresponds to T

Help!!!

Join Date: Nov 2005

Location: In a world of my own.

Posts: 333

1 X 8 = 8

9 X 17 = 153

5 X 4 = 20

0 X 16 = 0

3 X 2 = 6

8 X 13 = 104

5 x 5 = 25

Total = 316(A) / 23 = 13(.73913) x 23 = 299(B)

(A)316 – (B)299 = 16 = Letter S

My letter is W! Where have I gone wrong?

Aaron.

9 X 17 = 153

5 X 4 = 20

0 X 16 = 0

3 X 2 = 6

8 X 13 = 104

5 x 5 = 25

Total = 316(A) / 23 = 13(.73913) x 23 = 299(B)

(A)316 – (B)299 = 16 = Letter S

My letter is W! Where have I gone wrong?

Aaron.

Join Date: Sep 2008

Location: South Africa

Age: 82

Posts: 1,326

You went into the computer business in 1965? Please tell me you bought shares in IBM!

I don't own this space under my name. I should have leased it while I still could

Join Date: Dec 2002

Location: Lincolnshire

Age: 76

Posts: 16,613

TTN, last weekend in September to get a slightly better weather, doesn't always work. Organised by the Guernsey Association RN and RM, used to include RM band until MOD withdrew its support after the 70th, a C d'Honour at Government House, RNLI to a ceremonial wreath laying, a church service and a March to the cemetery with Salvation Army, St John's Ambulance, Police etc. The RN still tries to send a Guardship even though MOD does not support it.

Join Date: Aug 2016

Location: Nottingham

Posts: 28

ricardian's algorithm certainly wasn't the one used in the 1990s. With that algorithm, the letter will advance by 5 every time the number goes up by one, and by 14 every time the tens digit ticks over (e.g. xxxxx59 to xxxxx60). But in numbers from my era, the letter advances by 1 per number, or 4 when the tens digit ticks over.

2....58J

2....59K

2....60P

2....61Q

etc.

2....58J

2....59K

2....60P

2....61Q

etc.

Join Date: Sep 2010

Location: Republic of Yorkshire

Age: 71

Posts: 22

Hereford 1964 ? Mine was1950351with an A added a couple of months later. Using your calculation mine still comes out as A.

Regards

Pete Ross, Supp. Gen

Join Date: Jan 2004

Location: Great Yarmouth

Posts: 86

A former Commandant Air Cadets returned to 5AEF as Adj after his flying career ended. While on duty he was referred to as Flt Lt Ford. At ceremonial/formal occasions he was addressed as Air Commodore Ford, which he still is as Hon Wing President of Norfolk and Suffolk Wing ATC. I believe at one time ACM Sir Patrick Hine became Fg Off Hine RAFVR(T) while he was an AEF pilot....

Join Date: Aug 2003

Location: Stamford

Posts: 475

A slight change to the algorithm fixes it. Multiply the last digit by 1 (not 5), discard "I" and "O" in the alphabet and start at zero when counting through.

This works for all examples in the thread.

Service Number

1941305

1x8=8

9x17=153

4x4=16

1x16=16

3x2=6

0x13=0

5x1=5

A= 204

B= 184

A-B= 20

ABCDEFGHJKLMNPQRSTUVWXYZ (Starting with A=0)

Checkdigit W

This works for all examples in the thread.

Service Number

1941305

1x8=8

9x17=153

4x4=16

1x16=16

3x2=6

0x13=0

5x1=5

A= 204

B= 184

A-B= 20

ABCDEFGHJKLMNPQRSTUVWXYZ (Starting with A=0)

Checkdigit W

Join Date: Aug 2000

Location: Here and there.

Posts: 858

Join Date: Aug 2016

Location: Nottingham

Posts: 28

Sorry, too interested in all the codebreaking. I've just realised that as well as I and O, Z is also omitted (hence the use of modulo 23), so A follows Y, unless Y was suffixing a number ending in 9, in which case the next letter is D.

*Last edited by Underbolt; 15th Sep 2016 at 16:54.*