Question : Directions: In the following question, select the missing number of the given series. 25, 23, 19, 11, –5, ?
Option 1: –40
Option 2: –30
Option 3: –50
Option 4: –37
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Correct Answer: –37
Solution : Given: 25, 23, 19, 11, –5, ?
In the above-given series, subtract twice the difference of the previous two numbers from the next number. 25 – 2 = 23; 23 – (2 × 2) = 23 – 4 = 19; 19 – (4 × 2) = 19 – 8 = 11; 11 – (8 × 2) = 11 – 16 = –5; –5 – (16 × 2) = –5 – 32 = –37
So, the missing number of the series is –37. Hence, the fourth option is correct.
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