Difference between revisions of "1992 AHSME Problems/Problem 18"

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Revision as of 00:10, 28 September 2014

Problem

The increasing sequence of positive integers $a_1,a_2,a_3,\cdots$ has the property that

\[a_{n+2}=a_n+a_{n+1} \text{  for all } n\ge 1.\]

If $a_7=120$, then $a_8$ is

$\text{(A) } 128\quad \text{(B) } 168\quad \text{(C) } 193\quad \text{(D) } 194\quad \text{(E) } 210$

Solution

$\fbox{D}$

See also

1992 AHSME (ProblemsAnswer KeyResources)
Preceded by
Problem 17
Followed by
Problem 19
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All AHSME Problems and Solutions

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