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Questions  >>  Olympiad-Math  >>  Class 3
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How many 8's are there in the following number sequence which are immediately followed by '5' and not immediately followed by 3 <br>$6\; 3\; 8\; 6\; 2\; 6\; 4\; 8\; 5\; 7\; 1\; 8\; 3\; 6\; 4\; 8\; 5\; 9\; 8\; 3\; 4\; 6\; 8\; 3$

$\begin{array}{11} (a)\; 3 \\ (b)\; 6 \\ (c)\; 2 \\ (d)\; 5 \end{array}$

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