Question : Directions: Study the given pattern carefully and select the number that can replace the question mark (?) in it. (13, 4, 18) (49, 24, 50) (87, 51, ?)
Option 1: 84
Option 2: 69
Option 3: 72
Option 4: 76
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Correct Answer: 72
Solution : Given: (13, 4, 18) (49, 24, 50) (87, 51, ?)
Subtract the second number from the first number and the resultant is multiplied by 2 to obtain the third number. (13, 4, 18)→13 – 4; = 9; 9 × 2 = 18 (49, 24, 50)→49 – 24 = 25; 25 × 2 = 50 Similarly, (87, 51, ?)→87 – 51 = 36; 36 × 2 = 72
So, the required number in the set is 72. Hence, the third option is correct.
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