# The New Number Fact Game

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 1069643.  Sat Apr 19, 2014 3:34 am In 1086 the Domesday Book was fully compiled.

 1069645.  Sat Apr 19, 2014 3:46 am On the 9th of September, 1087, William II became King of England.

 1069749.  Sun Apr 20, 2014 9:55 am ERT 1088A is an Emergency Roadside Telephone box* on the M621 in West Yorkshire near Leeds * (SOS phone -- we have hundreds of these nationwide)

 1069751.  Sun Apr 20, 2014 10:01 am Take any 3-digit number in which the first and last digits differ by 2 or more. Reverse the number, and subtract the smaller of the two numbers from the larger. Then reverse the result and add up these two numbers. The result will always be 1089. Example: 401-104=297. 297+792=1089.

1069780.  Sun Apr 20, 2014 1:34 pm

 Ian Dunn wrote: The result will always be 1089. Example: 401-104=297. 297+792=1089.

He's right!
Does anyone know why?

 1069870.  Sun Apr 20, 2014 10:15 pm 1090 is the exclusive helpline number for Indian women to report crank callers.

1069875.  Mon Apr 21, 2014 2:38 am

Quote:
 Quote: The result will always be 1089. Example: 401-104=297. 297+792=1089.

He's right!
Does anyone know why?

abc = 100a + 10b + c
cba = 100c + 10b + a

abc - cba = 100(a - c) + (c - a) = 99(a - c)

Possible answers (def), excluding 99: 198, 297, 396, 495, 594, 693, 792, 891

198 = Reverse(891)
297 = Reverse(792)
396 = Reverse (693)
495 = Reverse(594)

d + f = 9
e = 9

def + fed = (9 * 100) + ((9 + 9) * 10) + (9 * 1) = 1089

 1069890.  Mon Apr 21, 2014 4:50 am Britain's first recorded tornado struck London on 17th October 1091, damaging London Bridge and St. Mary-le-Bow church. Source

 1069893.  Mon Apr 21, 2014 5:00 am The Messerschmitt P.1092 was an experimental aircraft designed by Messerschmitt for the Luftwaffe.

 1069896.  Mon Apr 21, 2014 5:23 am Renault marketed variants of the Dauphine, including a sport model, the Gordini, a luxury version, the Ondine, the 1093 factory racing model, and the Caravelle/Floride, a Dauphine-based two-door convertible.

 1069898.  Mon Apr 21, 2014 5:26 am In May 1094 Charlton 'Jaw' Heston completes his conquest of Valencia, Spain, and begins his rule of Valencia. [sorry - El Cid]

 1069900.  Mon Apr 21, 2014 5:34 am Canonical Law Can. 1095 The following are incapable of contracting marriage: 1/ those who lack the sufficient use of reason; 2/ those who suffer from a grave defect of discretion of judgment concerning the essential matrimonial rights and duties mutually to be handed over and accepted; 3/ those who are not able to assume the essential obligations of marriage for causes of a psychic nature.

 1069916.  Mon Apr 21, 2014 6:57 am In May, 1096, a band of crusaders led by Emico, a German noble, forced its way into the city of Mainz, and then to the palace, where infidel Jews were killed.

 1070073.  Tue Apr 22, 2014 6:26 am Petar Svačić, the last native king of Croatia, is killed in the Battle of Gvozd Mountain in 1097.

 1070099.  Tue Apr 22, 2014 8:39 am The Ducati 1098 sport motorcycle was manufactured from 2007 to 2009.

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