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How are two or more rational numbers added together?
They make a rational number.
What is the sum of the numbers from 1 to 1000?
These numbers added together make the 1000th triangle number, which is 500,500.
What 2 even numbers added together to make the sum be odd?
The sum of two even number is always even. So there are no such numbers.
What two prime numbers between 10 and 20 added together make a square number?
17 and 19
What 5 odd numbers equal 30 when added and you can use the odd numbers more than once?
There are no 5 odd numbers that when added together make 30.Two odd numbers added together make an even numberAn odd number plus and even number makes an odd number.From the five odd numbers:Take two of them and add them together getting an even number and four odd numbersAdd another of the odd numbers to this even number and you will have three odd numbersAdd two of these together and you will have one even and one odd number.Finally add these odd and even numbers together and the result will be an odd numberBut 30 is an even number, so cannot be the sum of five (or any odd number of) odd numbers.
