According to Wittgenstein's Finite Rule Paradox every finite sequence of numbers can be a described in infinitely many ways - some simple, some complicated but all equally valid.
One possible pattern is the cubic polynomial:
U(n) = (n3 - 17n2 + 25n - 150)/2 for n = 1, 2, 3, ...
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After putting them in order, cross out the 'ends' First 58 and 80 Then 58 and 74 You are left with 63 and 69 The median number is 66. The median is the number in the 'middle.'
It is 18.
74/100 * 80 = 59.2
80% of 63 is 50.4
80/126 = 40/63