Question : Directions: If 8 * 9 # 3 = 51 and 12 * 6 # 4 = 72, then 13 * 11 # 6 = ?
Option 1: 156
Option 2: 128
Option 3: 136
Option 4: 144
Correct Answer: 144
Solution :
Given:
8 * 9 # 3 = 51; 12 * 6 # 4 = 72
Use the following mathematical signs in place of given symbols –
+ in place of * and × in place of #.
Like, 8 * 9 # 3 = 51→(8 + 9) × 3 = 17 × 3 = 51
And, 12 * 6 # 4 = 72→(12 + 6) × 4 = 18 × 4 = 72
Similarly, 13 * 11 # 6, we get (13 + 11) × 6 = 24 × 6 = 144
Hence, the fourth option is the correct answer.
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