Question : Directions: Study the given pattern carefully and select the number that can replace the question mark (?) in it.
(15, 13, 10, 2)
(20, 5, 4, 11)
(13, 8, 13, 6)
(7, 6, 2, ?)
Option 1: 29
Option 2: 25
Option 3: 32
Option 4: 27
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Correct Answer: 25
Solution :
Given:
(15, 13, 10, 2) (20, 5, 4, 11) (13, 8, 13, 6) (7, 6, 2, ?)
The sum of the numbers of each set is equal to 40.
(15, 13, 10, 2) = 15 + 13 + 10 + 2 = 40
(20, 5, 4, 11) = 20 + 5 + 4 + 11 = 40
(13, 8, 13, 6) = 13 + 8 + 13 + 6 = 40
Similarly, (7, 6, 2, ?) = 7 + 6 + 2 + ? = 40 (Let the missing number be a.)
⇒ 15 + a = 40
⇒ a = 40 – 15
⇒ a = 25
So, the required number is 25. Hence, the second option is correct.
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