Ten of them.
70
3
There are 19 integers between 1 and 100 containing a 5.
That would be the numbers in the form "32x" (where "x" can be any digit). In other words, ten numbers.
To find how many numbers between 1 and 99 contain the digit '2', we can analyze both the tens and units places. In the tens place, the numbers are 20-29, giving us 10 occurrences. For the units place, the numbers with '2' are 2, 12, 22, 32, 42, 52, 62, 72, 82, and 92, totaling 10 occurrences. Therefore, the total count of numbers between 1 and 99 that contain the digit '2' is 19 (10 from the tens place and 9 additional from the units place, excluding 22 which was counted twice).
70
3
20
Well, let's see here, when we talk about numbers with 5 tens, we're looking for numbers between 50 and 59. There are 10 numbers in this range that have 5 tens. So, the answer is 10. It's a happy little math question that just wants to be solved.
Five
There are 19 integers between 1 and 100 containing a 5.
That would be the numbers in the form "32x" (where "x" can be any digit). In other words, ten numbers.
530
An infinite number.
there is 3 tens and 4 ones in the following number 34
70
Numbers that have 3 tens range from 30 to 39. This includes all the integers from 30 to 39, which totals 10 numbers: 30, 31, 32, 33, 34, 35, 36, 37, 38, and 39. Therefore, there are 10 numbers that have 3 tens.