Question : Directions: Which of the following numbers will replace the question mark (?) in the given series?
13, 9, 5, 1, –3, –7, –11, ?
Option 1: –13
Option 2: –15
Option 3: –14
Option 4: –16
Answer (1)
10th Jan, 2024
Correct Answer: –15
Solution :
Given:
13, 9, 5, 1, –3, –7, –11, ?
Subtract 4 from each number to obtain the next number.
13 – 4 = 9; 9 – 4 = 5; 5 – 4 = 1; 1 – 4 = –3; –3 – 4 = –7; –7 – 4 = –11; –11 – 4 = –15
So, the missing number of the series is –15. Hence, the second option is correct.
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