A
Q. A is 3 years older to B and 3 years younger to C, while B and D are twins. How many years older is C to D?
Explanation by: Ankit Singh
Since B and D are twins, so B = D. Now, A = B + 3 and A = C - 3. Thus, B + 3 = C - 3 ⇔ D + 3 = C-3 ⇔ C - D = 6.
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