Question : Directions: In the following question a series is given, with one number missing. Select the missing number from the given alternatives.
1, 3, 6, 11, 18, ?
Option 1: 27
Option 2: 28
Option 3: 29
Option 4: 31
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Correct Answer: 29
Solution :
Given:
1, 3, 6, 11, 18, ?
Add consecutive prime numbers to each term to obtain the next term in the series –
1 + 2 = 3; 3 + 3 = 6; 6 + 5 = 11; 11 + 7 = 18; 18 + 11 = 29
The missing number is 29. Hence, the third option is correct.
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