In a certain code language, if 18 (9) 3 and 36 (30) 5, then what is the value of A in 19 (A) 18?

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A 33
B 57
C 75
D 96

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Answer: B. 57

The middle number is the product of the outer numbers divided by 6: 18 × 3 = 54, 54 ÷ 6 = 9; 36 × 5 = 180, 180 ÷ 6 = 30. So A = 19 × 18 ÷ 6 = 342 ÷ 6 = 57.

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In a certain code language, if 18 (9) 3 and 36 (30) 5, then what is the value of A in 19 (A) 18?

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