1988 AHSME Problems/Problem 1

Revision as of 00:42, 23 October 2014 by Timneh (talk | contribs)
(diff) ← Older revision | Latest revision (diff) | Newer revision → (diff)

Problem

$\sqrt{8}+\sqrt{18}=$

\[\text{(A)}\ \sqrt{20}\qquad\text{(B)}\ 2(\sqrt{2}+\sqrt{3})\qquad\text{(C)}\ 7\qquad\text{(D)}\ 5\sqrt{2}\qquad\text{(E)}\ 2\sqrt{13}\]

Solution

$\sqrt{8} = 2  \sqrt{2}$

$\sqrt{18} = 3  \sqrt{2}$

So adding the two terms we get $2  \sqrt{2} + 3  \sqrt{2} = 5  \sqrt{2}$ , which corresponds to answer choice $\boxed{\textbf{(D)}}$ .


See also

1988 AHSME (ProblemsAnswer KeyResources)
Preceded by
First Question
Followed by
Problem 2
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
All AHSME Problems and Solutions

The problems on this page are copyrighted by the Mathematical Association of America's American Mathematics Competitions. AMC logo.png

Invalid username
Login to AoPS