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What types of numbers can always be written as the sum of two nonzero consecutive whole numbers?
ODD NUMBERS. If you take two consecutive whole (non zero) numbers then one will be an odd number and the other will be an even number. The sum of an odd number and an even number is always an odd number.
What is the sum of a number and its opposite?
The sum of a number and its negative (additive inverse) is zero. For any nonzero value n, n + (-n) = 0
What is the sum of the even digits?
Sum of the first n even numbers starting with 0 (counting 0 as the first number, 2 would be the second number.... etc) is n x (n-1)
What is the sum of the first 30 positive even numbers combined?
The answer to what is the sum of the first positive even numbers is 930. It doesn't mean that you add all the even numbers up until you reach the number 30. In fact, since you have to get the sum of the even numbers, you have to add all even numbers until you get to the number 60.
Is the sum of a prime number and a composite number always even?
No, the sum of a prime number and a composite number is not always even.
