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2019 Mock AMC 10B Problems/Problem 1

Problem

What is the difference between $6+7+8+9+10$ and $1+2+3+4+5$?

$\textbf{(A)}\ 10\qquad\textbf{(B)}\ 15\qquad\textbf{(C)}\ 20\qquad\textbf{(D)}\ 25\qquad\textbf{(E)}\ 30$

Solution

Simply computing we get: \[40-15\] which equals \[\] $\boxed{\bold{D}}$ $\bold{25}$

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