My grandson is about as many days as my son is weeks, and my grandson is as many months as I am in years. My grandson, my son and I together are 120 years. Can you tell me my age in years?

Let the grandson's age be $G$, son's $S$, and grandfather's $I$. The problem states $S = 7G$ (weeks vs days) and $I = 12G$ (years vs months). Summing their ages: $G + 7G + 12G = 120$, which simplifies to $20G = 120$, so $G = 6$. Therefore, the grandfather's age is $12 \times 6 = 72$. Distractors fail to satisfy this linear ratio.