keajaiban kebalikan 1089

1089 adalah nilai kuadrat dari 33. jadi 1089 = 33 x 33. bilangan ini memiliki keajaiban:

1089 x 1 = 1089 dan 1089 x 9 =9801 (kebalikan 1089)
1089 x 2 = 2178 dan 1089 x 8 =8712 (kebalikan 2178)
1089 x 3 = 3267 dan 1089 x 7 =7623 (kebalikan 3267)
1089 x 4 = 4356 dan 1089 x 6 =6534 (kebalikan 4356)
1089 x 5 = 5445 dan 1089 x 5 =5445 (kebalikan 5445)

keajaiban perkalian 8547 dengan kelipatan 13

13 x 8.547 = 111.111
26 x 8.547 = 222.222
39 x 8.547 = 333.333
52 x 8.547 = 444.444
65 x 8.547 = 555.555
78 x 8.547 = 666.666
91 x 8.547 = 777.777
104 x 8.547 = 888.888
117 x 8.547 = 999.999

keajaiban perkalian 15873 dengan kelipatan 7

7 x 15.873 = 111.111
14 x 15.873 = 222.222
21 x 15.873 = 333.333
28 x 15.873 = 444.444
35 x 15.873 = 555.555
42 x 15.873 = 666.666
49 x 15.873 = 777.777
56 x 15.873 = 888.888
63 x 15.873 = 999.999

keajaiban perkalian 37 dengan kelipatan 3

37 x 3 = 111
37 x 6 = 222
37 x 9 = 333
37 x 12 = 444
37 x 15 = 555
37 x 18 = 666
37 x 21 = 777
37 x 24 = 888
37 x 27 = 999

keajaiban invers 1 sampai 9

1 x 8 + 1 = 9
12 x 8 + 2 = 98
123 x 8 + 3 = 987
1234 x 8 + 4 = 9876
12345 x 8 + 5 = 98765
123456 x 8 + 6 = 987654
1234567 x 8 + 7 = 9876543
12345678 x 8 + 8 = 98765432
123456789 x 8 + 9 = 987654321

keajaiban perulangan 8

9 x 9 + 7 = 88
98 x 9 + 6 = 888
987 x 9 + 5 = 8888
9876 x 9 + 4 = 88888
98765 x 9 + 3 = 888888
987654 x 9 + 2 = 8888888
9876543 x 9 + 1 = 88888888
98765432 x 9 + 0 = 888888888

keajaiban perulangan 1 (2)

1 x 9 + 2 = 11
12 x 9 + 3 = 111
123 x 9 + 4 = 1111
1234 x 9 + 5 = 11111
12345 x 9 + 6 = 111111
123456 x 9 + 7 = 1111111
1234567 x 9 + 8 = 11111111
12345678 x 9 + 9 = 111111111
123456789 x 9 + 10 = 1111111111