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This is crossposted from Math.SE, the original question is here

$1+2+3+4 = 61$

$2+3+4+5 = 52$

$3+4+5+6 = 51$

$4+5+6+7 = 50$

$7+8+9+10 = ?$

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  • $\begingroup$ Ugh, do you HAVE to use $+$ and $=$ for these? $\endgroup$ – Deusovi Jan 17 '16 at 6:50
  • $\begingroup$ @Deusovi, why not? I think it is nicer this way. $\endgroup$ – klm123 Jan 17 '16 at 8:03
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\begin{align}7+8+9+10&\to\text{Seven}+\text{Eight}+\text{Nine}+\text{Ten}\\&\to\text{S}+\text{E}+\text{N}+\text{T}\\&\to\text{Alphabet}_{19}+\text{Alphabet}_{5}+\text{Alphabet}_{14}+\text{Alphabet}_{20}\\&\to19+5+14+20\\&=58\end{align}

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