Question : Directions: If 19 (36) 13 and 37 (81) 28, then what is the value of A in 43 (A) 38?
Option 1: 49
Option 2: 25
Option 3: 34
Option 4: 64
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Correct Answer: 25
Solution : Given: 19 (36) 13, 37 (81) 28
The pattern in the equation 19 (36) 13 is 19 – 13 = 6; 6 2 = 36 The pattern in the equation 37 (81) 28 is 37 – 28 = 9; 9 2 = 81 Similarly, 43 (A) 38→43 – 38 = 5; 5 2 = 25
So, the value of A is 25. Hence, the second option is correct.
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