These are the mentions of
the number twelve that I have found so far. I did include dozen and half-dozen,
but that is as far as I have stretched the list.
This golden pocket watch is
very odd. It has twelve hands but no numbers. Instead, little planets move along the edge. SS-1
Considered by many to be the
greatest wizard of modern times, Dumbledore is particularly famous for his
defeat of the dark wizard, Grindelwald in 1945, for the discovery of the twelve
uses of dragon's blood, and his work on alchemy with his partner, Nicolas
Flamel. SS-6
It (the Troll) was a
horrible sight. Twelve feet tall, its skin was a dull, granite gray, its
lumpy body like a boulder with it small bald head perched on top like a
coconut. SS-10
Festoons of holly and
mistletoe hung all around the walls, and no less than twelve towering
Christmas trees stood around the room, some sparkling with tiny icicles, some
glittering with hundreds of candles. SS-12
"You're worth twelve
of Malfoy," Harry said. SS-13
Neville went bright red but
turned in his seat to face Malfoy. "I'm worth twelve of you,
Malfoy," he stammered. SS-13
All the same, he'd have
gambled twelve Sorcerer's Stones that Snape had just left the room, and
from what Harry had just heard, Snape would be walking with a new spring in his
step --- Quirrel seemed to have given in at last. SS-15
Dear Mr. Potter We have
received intelligence that a Hover Charm was used at your place of residence
this evening at twelve minutes past nine. CS-2
"I've asked you to stay
about twelve times, and then Dad came home and said you'd got an
official warning for using magic in front of Muggles---" CoS-3
"You have told me this
at least a dozen times already," said Mr. Malfoy, with a quelling
look at his son. CS-4
Ron looked wildly around. A dozen
curious people were still watching them. CS-5
"His exam results came
in the day before you did: twelve O.W.L.s and he hardly gloated at
all." CS-4
"Bill got twelve,
too. If we're not careful, we'll have another Head Boy in the family."
CS-4
After a quick half a dozen
bacon sandwiches each, they pulled on their coats and Mrs. Weasley took a
flowerpot off the kitchen mantelpiece and peered inside.CS-4
"But when I was twelve,
I was just as much of a nobody as you are now," said Gilderoy Lockhart
CS-6
"I must admit, Peter, I
have difficulty in understanding why an innocent man would want to spend twelve
years as a rat," said Lupin evenly. PA-19
Something was slithering
towards him along the dark corridor floor, and as it drew nearer to the sliver
of firelight, he realized with a thrill of terror that it was a gigantic snake,
at least twelve feet long. GF-1
All three Triwizards events
take place on the 24th of a month. Multiples count in numerology.
GoF
"Anyway, they cornered
Black in the middle of a street full of Muggles an' Black took out 'is wand and
'e blasted 'alf the street apart, an' a wizard got it, and' so did a dozen
Muggles what got in the way." PoA-3
"At lunchtime, they
went down to the Great Hall, to find that the House tables had been moved
against the walls again, and that a single table, set for twelve, stood
in the middle of the room." PoA-11
From the interview
transcript with JKR February 3, 2000:
Q. Do you have a favorite
passage from one of your books?
A.Hard to choose. I like
chapter twelve of Sorcerer's Stone (The Mirror of Erised), and I am
proud of the ending of Goblet of Fire.