Digital Clock Game

Numbers in sequence
1234 - 26 minutes to one
1111 - eleven minutes past eleven
123, 321, 132, 135, 246 or whatever

Three numbers
222, 444, 555
1000 shows a dark bar across all the numbers

Pair of Numbers
122, 212 etc

Mirror numbers
2 and 5, as in 522 or x52
or best 525 with the hour colon as the champagne bubbles
1001
1221 or better 1251

Simple Arithmetic
321 3-2=1
325 3+2=5
326 3*2=6
329 3**2=9

Divides neatly
618 18/6 (=3 no remainder)
1040 40/10 (=4)

Trademark numbers
747, 737, 727, 707
57 Heinz
99 Ice Cream
69 (609) Sex Position
76 (706) Trombones
505 SOS help
47 AK47 rifle

Bingo Calls
11 Legs Eleven
12 One Dozen
13 Unlucky for Some
21 Key of the Door
66 (606) Clickety Click
88 (808) Two Fat Ladies
(source: www.14g.com/bingo/knowledge/bingo_calls/)

Ten Code
10-2 good reception
10-4 message received,
10-6 busy
10-7 out of service
10-10 fight in progress
(source: en.wikipedia.org/wiki/Ten-code)