27 of them.
11, 22, 33, 44, 55, 66, 77, 88, 99,
100, 101, 121, 122, 131, 133, 141,
144, 151, 155, 161, 166, 171, 177,
181, 188, 191, and 199.
27 numbers between 10 to 200
27
it s 243..
900
900000
there are 89 twodigits in whole numbers
27
11 is the only prime number with identical digits. After 11 all numbers with identical digits can be divided by atleast 11 or 3.
it s 243..
how many numbers exactly have 4 digits ? 8900, 8999, 9000, 9999
90 of them.
There are 90 of them.
900
900000
90000 of them.
there are 89 twodigits in whole numbers
Assuming that 001, 080, etc are not allowed (that is a leading zero or two is not permitted), the smallest number with exactly three digits is 100. The largest number with exactly three digits is 999. So there are 999 - 100 + 1 = 900 numbers with exactly three digits.
90