There are 45 such numbers.
-2
How many two digit numbers are there in which the tens digit is greater than the oneβs digit ?
17
72. (with the range of two digit numbers being from 10 to 99).
1
It would help to know which digit. 0 appears in 9 numbers and each of the others in 18 numbers.
The answer will depend on how many digits there are in each of the 30 numbers. If the 30 numbers are all 6-digit numbers then the answer is NONE! If the 30 numbers are the first 30 counting numbers then there are 126 combinations of five 1-digit numbers, 1764 combinations of three 1-digit numbers and one 2-digit number, and 1710 combinations of one 1-digit number and two 2-digit numbers. That makes a total of 3600 5-digit combinations.
All of them.
45
36 of them.
45 of them.
2