252
252
46000
i think alot like 100 at least
17
There are 9000 4-digit numbers. 8*9*9*9 = 5832 of them do not contain a 5 The remaining 3168 contain a 5.
252
27: 077,177,277,377,477,577,677,877,977,717,727,737,747,757,767,777,787,797
46000
4,748,472 Confirmed using the following C# function string sTemp; int total = 0; for (int i = 1000000; i < 10000000; i++) { sTemp = i.ToString(); if (sTemp.Contains("7")) { total++; } } label1.Text = total.ToString();
i think alot like 100 at least
17
There are 9000 4-digit numbers. 8*9*9*9 = 5832 of them do not contain a 5 The remaining 3168 contain a 5.
-2
1
It would help to know which digit. 0 appears in 9 numbers and each of the others in 18 numbers.
-5
10293330201309i31841481389