The numbers are 135 and 136.
288. All multiples of 9 will have digits that add to a multiple of 9. To get a multiple of 9 to be all even, you need to get them to add to 18, since no set of even numbers will add up to 9. 288 is the lowest multiple of 9 to be able to add to 18. ■
79
270
The answer is 1152. Simply add the numbers together arithmetically as you would for the problem two plus two. To check your work, a calculator is the best option.
There are no such numbers but if you meant -135 then the numbers are -9 and 15
The numbers are 135 and 136.
141
137
111
595
288. All multiples of 9 will have digits that add to a multiple of 9. To get a multiple of 9 to be all even, you need to get them to add to 18, since no set of even numbers will add up to 9. 288 is the lowest multiple of 9 to be able to add to 18. ■
-79
1801
79
270
-1