999 are whole.
The two numbers whose sum is 58 and whose difference is 16 are 21 and 37.
100
There are no 3-digit whole numbers whose digits sum to 3. The smallest 3-digit number is 100, and the largest is 999, but in neither case is the sum of the digits equal to 3.
There are infinitely many. For example, 14,104,1004,10004,100004 etc.
999 are whole.
6
number of pairs of odd numbers whose sum is 32: 8pairs of odd numbers whose sum is 32:1, 313, 295, 277, 259, 2311, 2113, 1915, 17
There are 3 whose sum is 45 whose sum is 57 whose sum is 69 whose sum is 711 whose sum is 813 whose sum is 915 whose sum is 1017 whose sum is 1119 whose sum is 1219 whose sum is 1317 whose sum is 1415 whose sum is 1513 whose sum is 1611 whose sum is 179 whose sum is 187 whose sum is 195 whose sum is 203 whose sum is 211 whose sum is 22.
There are 5460 five digit numbers with a digit sum of 22.
The two numbers whose sum is 58 and whose difference is 16 are 21 and 37.
450.
100
Eight
find two positive numbers whose product is a maximum. 1.) the sum is s.
There are no 3-digit whole numbers whose digits sum to 3. The smallest 3-digit number is 100, and the largest is 999, but in neither case is the sum of the digits equal to 3.
69