It means when you have a sentence and the words are with the same letter but you can use a word with the opposite letter for example never not use Nerf
It could, depending, be defined as: Cruel, unnice, or being either of these i.e. insulting someone or an average, which is found by addidng the numbers and then dividing by the number of numbers,...
living thing- cytoplasm non living things - chair but remember, viruses are considered as both living and non living things. so a virus is your answer for your question
If you mean the math term, then I can help. I am a certified math teacher, so no worries.
Add ALL THE NUMBERS, and divide by however many numbers you added.
EXAMPLE: 10, 20, 30. added, that equals...