Question : Directions: If 5 * 3 = 19 and 8 * 5 = 49, then what should be the value of 6 * 4 = ?
Option 1: 24
Option 2: 28
Option 3: 18
Option 4: 16
Correct Answer: 28
Solution :
Given:
5 * 3 = 19
8 * 5 = 49
(5 * 3) = 19→(5)
2
– {(5 – 3) × 3} = 25 – {2 × 3} = 25 – 6 = 19
(8 * 5) = 49→(8)
2
– {(8 – 5) × 5} = 64 – {3 × 5} = 64 – 15 =
49
Similarly, for (6 * 4)→(6)
2
– {(6 – 4) × 4} = 36 – {2 × 4} = 36 – 8 = 28
Hence, the second option is correct.
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