Doubling (AABBCC)
Make it instantly recognisable
7699 5555 13
?14,376
?11,501
7699 5555 36
?14,376
?11,501
776600 1366
?8,125
?6,500
91 996611 90
?12,501
?10,001
96600 99160
?12,501
?10,001
96366 55771
?18,625
?14,900
95711 99117
?18,625
?14,900
73577 11559
?13,751
?11,001
77799 55173
?13,751
?11,001
9669 966 743
?4,625
?3,700
73 882233 70
?3,125
?2,500
7 88112277 5
?3,375
?2,700
81 99 88 0070
?3,250
?2,600
70 888888 09
?82,499
?65,999
759977 0005
?6,874
?5,499
7460066007
?13,751
?11,001
7777 995956
?6,875
?5,500
8866665498
?5,624
?4,499
9044443392
?5,624
?4,499
9755550047
?10,001
?8,001
7699999944
?1,18,749
?94,999
9571199559
?10,625
?8,500
8577000096
?13,126
?10,501
7310222233
?12,501
?10,001
Doubling (AABBCC) number pattern