Eleven.
1098
763 of them.
There are 9592 primes.
100.
somewhere between 1 and 100000 would be my guess
111 of them with a remainder of 1
There are: 640/9 = 71 with a remainder of 1
1 million = 1000000 → 1 million ÷ 100000 = 1000000 ÷ 100000 = 10
9, 19, 29, 39, 49, 59, 69, 79, 89, 90, 91, 92
8, remainder 1
1 or 4 , depending on your point of view.