50
1221, 2112, 3003, 10401, 11211, 12021
There is no number. 100 is the only one that has a hundreds digit. It's impossible.
sum
None. The sum of one digit can't be twice the size of the digit.
199999.
50
There are five such numbers.
There are 5460 five digit numbers with a digit sum of 22.
It's just five. The digit sums of the number are attained by adding up each place value. ex.) Digit sum of 152 is 1+5+2 (which is 6, by the way).
47184
1221, 2112, 3003, 10401, 11211, 12021
36748. 3 6 7 + 4 8 __ 28
What is the sum of greatest 3-digit 4-digit 5digit
There is no number. 100 is the only one that has a hundreds digit. It's impossible.
sum
3 + 13 + 23 + 31 + 37 = 107