Question : Directions: (2)* * 4 = 2, and (4)* * 4 = 16, then what is the value of A in (6)* * A = 18?
Option 1: 12
Option 2: 14
Option 3: 16
Option 4: 20
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Correct Answer: 12
Solution : Given: (2) * * 4 = 2; (4) * * 4 = 16
Like, (2) * * 4 = 2; 2 3 ÷ 4 = 8 ÷ 4 = 2 (4) * * 4 = 16; 4 3 ÷ 4 = 64 ÷ 4 = 16 Similarly, (6) * * A = 18; ⇒ 6 3 ÷ A = 18 ⇒ 216 ÷ A = 18 ⇒ A = 216 ÷ 18 ⇒ A = 12
Hence, the first option is correct.
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