In the following question, select the number which can be placed at the sign of question mark (?) from the given alternatives.
Show answer & explanation
Correct answer: B
Explanation
Following the pattern in the numbers: (First + Second + Third) × 2 = Fourth
Row 1: (7 + 5 + 3) × 2 = 15 × 2 = 30
Row 2: (6 + 5 + 9) × 2 = 20 × 2 = 40
Similarly,
Row 3: (? + 7 + 10) × 2 = 36
? + 17 = 18
? = 18 - 17 = 1
Option (2) is the correct answer.