Which number replaces the question mark? 4, 9, 16, 25, ?, 49
\[ \text{Sequence: } 4,\ 9,\ 16,\ 25,\ \ ?\ ,\ 49 \] \[ \text{Pattern: consecutive squares } (2^2,\,3^2,\,4^2,\,5^2,\,6^2,\,7^2) \] \[ \therefore\ ? = 6^2 = \boxed{36} \]
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