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MathNet 2006 — Part 02 Question 152

Math Olympiad Vault · MathNet 2006 — Part 02

Question 152

The symbol $\odot$ represents a special operation with numbers. See some examples $2 \odot 4=10, 3 \odot 8=27, \quad 4 \odot 27=112, \quad 5 \odot 1=10$. How much is $4 \odot(8 \odot 7)$ worth?

(A) 19

(B) 39

(C) 120

(D) 240

(E) 260