In an A.P., the $6^{\text{th}}$ term is $52$ and the $11^{\text{th}}$ term is $112$. Then the common difference is equal to:
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A faster way to find \( d \) is using the formula:
\( d = \frac{a_p - a_q}{p - q} \).
Substituting our values: \( d = \frac{112 - 52}{11 - 6} = \frac{60}{5} = 12 \).