9999+8888+7777
(7777-6666)/1111 = 1 (4444+5555)/(9999/3333) = 3 8888/2222 = 4 4*3 + 1 =13
One solution: 0990 + 0000 + 0000 + 0066 + 0055 = 1111
There are 18 111, 222, 333, 444, 555, 666, 777, 888, 999, 1111, 2222, 3333, 4444, 5555, 6666, 7777. 8888. 9999
9999
1111...2222....3333....4444....5555....6666....7777....8888....9999....0000....1112....1113....1114....1115....1116....1117....1118....1119....1110....1120....1121....1122....1123....1124...1125....1126....1127....1128....1129....1130....1131....11
10
Try putting in 0000 1111, 2222, 3333, 4444, 5555, 6666, 7777, 8888, or 9999 it's most likely one of them. If this doesn't work, then I would suggest putting in random numbers. If none of these work, then it would just be best to go to the phone store or call customer service.
It is 8888 squared or the number 78996544
A cryptogram. xxxx + yyyy + zzzz = yxxxz 9999 + 1111 + 8888 = 19998
7777 - MMMMMMMDCCLXXVII
17776
8890