2 + 164 + 146 + 128 + 104 pairs of even numbers can be found whose sum is eighteen.
12 14
Infinitely many. However, if you don't want negative numbers, the lower of the two numbers must be at least 0, and at most 22. The higher of the two numbers, of course, will be 46 minus the first number. Perhaps you can work it out from there.
-- There are 11 even numbers that are less than 1/2 of 46. -- Each of those can be paired with another even number that is more than 1/2 of 46. -- So there are 11 possibilities.
The numbers are 38, 40 and 42.
2 + 164 + 146 + 128 + 104 pairs of even numbers can be found whose sum is eighteen.
If you include negative numbers, the list is infinite.
assuming you want only positive numbers 2+10 4+8 6+6
Yes there is there should be!
12 14
The factors of all numbers can be written in pairs. With square numbers, one of those pairs is the same number twice. When listed singly, square numbers have an odd number of factors. All others are even.
Even numbers are those that are divisible by 2. As 12 is divisible by 2, it is even.
The numbers are 18 and 20.
Infinitely many. However, if you don't want negative numbers, the lower of the two numbers must be at least 0, and at most 22. The higher of the two numbers, of course, will be 46 minus the first number. Perhaps you can work it out from there.
no
You cannot do this, because you're taking odd numbers: if you add two odd numbers together, you will get an even number. Take the odd numbers in pairs, so you'll have 3 pairs plus an extra odd number. The 3 pairs make 3 even numbers. You can add up any number of even numbers and get an even number, so you will have an even + odd, which is odd. 30 is an even number, but your result will be odd, no matter what 7 odd numbers you choose.
The numbers 45,20 begin with even numbers and they end with 5 or 0.