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. ■
4+5=9
even
Add 8 and 9 and then divide them by twp because there are two numbers and when you count how many numbers there are, they are a even number. 0, 2, 4, 6, and 8 is even numbers and odd numbers are 1, 3, 5, 7, and 9.
odd even numbers end in 2 , 4 , 6 , 8 , 0 odd numbers end in 1 , 3 , 5 , 7 , 9
An odd number of odd numbers can not add up to an even number. There fore any 9 (odd) odd numbers can not add up to 50 (even).
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. ■
4+5=9
even
Add 8 and 9 and then divide them by twp because there are two numbers and when you count how many numbers there are, they are a even number. 0, 2, 4, 6, and 8 is even numbers and odd numbers are 1, 3, 5, 7, and 9.
odd even numbers end in 2 , 4 , 6 , 8 , 0 odd numbers end in 1 , 3 , 5 , 7 , 9
You must add either two odd numbers or two even numbers.
18
The answer will be even because if the numbers are even, the answer will be even.
None. If you add two even numbers, you'll end up with another even number.
-1
The two numbers are 1 and -9