9
I'm thinking of a number between 1 and 99. Whoever guesses it gets 10 trophies-PROMISE

22,23,24,25,26,27,28,29,30
31 thirty- one |
32 thirty- two |
33 thirty- three |
34 thirty- four |
35 thirty- five |
36 thirty- six |
37 thirty- seven |
38 thirty- eight |
39 thirty- nine |
40 forty |
41 forty- one |
42 forty- two |
43 forty- three |
44 forty- four |
45 forty- five |
46 forty- six |
47 forty- seven |
48 forty- eight |
49 forty- nine |
50 fifty |
51 fifty- one |
52 fifty- two |
53 fifty- three |
54 fifty- four |
55 fifty- five |
56 fifty- six |
57 fifty- seven |
58 fifty- eight |
59 fifty- nine |
60 sixty |
61 sixty- one |
62 sixty- two |
63 sixty- three |
64 sixty- four |
65 sixty- five |
66 |
67 |
68 |
8