Question : Directions: Select the option that can replace the question mark (?) in the second row.
Row1: 26, 17, 14, 23
Row2: 17, 12, ?, 9
Row3: 29, 32, 21, 18
Option 1: 7
Option 2: 2
Option 3: 4
Option 4: 19
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Correct Answer: 4
Solution : In a row, find the difference between the first number and the second number, and then add to the third number to get the fourth number.
In the first row→26 – 17 = 9 and 14 + 9 = 23
In the third row→29 – 32 = –3 and 21 + (–3) = 18
Similarly, in the second row→
17 – 12 = 5 and ? + 5 = 9 ⇒ ? = 4
So, 4 is the missing number in the given series. Hence, the third option is correct.
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