Question : Directions: In the following question, select the missing number from the given series.
15, 4, –8, –21, –35, ?
Option 1: –48
Option 2: –50
Option 3: –49
Option 4: –30
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Correct Answer: –50
Solution :
Given:
15, 4, –8, –21, –35, ?
Subtract natural numbers starting from 11 to 15 successively from each term to obtain the next term.
(15 – 11) = 4; (4 – 12) = – 8; (– 8 – 13) = – 21; (– 21 – 14) = – 35; ( – 35 – 15) = – 50
So, – 50 is the missing term. Hence, the second option is correct.
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