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The fact that zero is one of the numbers in a list that you want to find the mean for doesn't make it any different to workout than a mean problem without the number zero. Just add up all of the numbers and then divide that number by how many numbers are in your list.
Assuming that you want the numbers that contain the letter 'o' the answer is 22.
A signle number does not define a sequence uniquely and so the next number can be any number that you want it to be.A signle number does not define a sequence uniquely and so the next number can be any number that you want it to be.A signle number does not define a sequence uniquely and so the next number can be any number that you want it to be.A signle number does not define a sequence uniquely and so the next number can be any number that you want it to be.
Any number that you choose can be the next number. It is easy to find a rule based on a polynomial of order 3 such that the first three numbers are as listed in the question followed by the chosen next number. There are also non-polynomial solutions. Short of reading the mind of the person who posed the question, there is no way of determining which of the infinitely many solutions is the "correct" one.For example,You want the next number to be 1? Then U(n) = (-20n^3 + 123n^2 - 214n + 171)/3You want the next number to be 2? Then U(n) = (-13n^3 + 80n^2 - 139n + 112)/2You want the next number to be 11? Then U(n) = -7n^3 + 40n^2 - 70n + 56You want the next number to be 101? Then U(n) = 10n^3 - 59n^2 + 112n - 43
You need to read your homework better if you want us to do it for you. We'd need the previous numbers or some clue. 4 looks vaguely like a triangle though and delta (but that's not typically a number).