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1982 AMC 12 Question 30

AMC12 · 1982 AMC 12

Question 30

Find the units digit in the decimal expansion of $$
(15+\sqrt{220})^{19}+(15+\sqrt{220})^{82}.
$$
  1. $0$
  2. $2$
  3. $5$
  4. $9$
  5. none of these