Question : Directions: Select the option that can replace the question mark (?) in the third row.
Row 1: 6, 24,14
Row 2: 7, 18, 13
Row 3: 4, ?, 9
Option 1: 15
Option 2: 29
Option 3: 18
Option 4: 22
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Correct Answer: 15
Solution :
Given:
Row 1: 6, 24,14
Row 2: 7, 18, 13
Row 3: 4, ?, 9
In each row, subtract the first number from the third number and multiply the result by 3 to get the second number –
Row 1:
(14 – 6) × 3 = 8 × 3 = 24
Row 2:
(13 – 7) × 3 = 6 × 3 = 18
Row 3:
(9 – 4) × 3 = 5 × 3 = 15
So, the required missing number is 15. Hence, the first option is correct.
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