None. The sum of one digit can't be twice the size of the digit.
-3
30,25,15,20, or 10.
46
Seven of them.
There are five such numbers.
There are 5460 five digit numbers with a digit sum of 22.
None. The sum of one digit can't be twice the size of the digit.
Only one . . . 999 .
-3
what is the least possible sum of two 4-digit numbers?what is the least possible sum of two 4-digit numbers?
2,4,6,8,10,12,14,16,18
30,25,15,20, or 10.
450.
21.
46
Seven of them.