Question : Directions: In the following question a series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series. 30, 28, 23, 21, ?
Option 1: 15
Option 2: 16
Option 3: 18
Option 4: 20
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Correct Answer: 16
Solution : Given: 30, 28, 23, 21, ?
Subtract 2 and 5 alternately to the previous number to get the next number. 30 – 2 = 28; 28 – 5 = 23; 23 – 2 = 21; 21 – 5 = 16
So, the missing number is 16. Hence, the second option is correct.
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