Question : Directions: Which of the following numbers will replace the question mark (?) and complete the given number series?
15, 19, 21, 25, 27, ?
Option 1: 31
Option 2: 32
Option 3: 29
Option 4: 30
Answer (1)
21st Jan, 2024
Correct Answer: 31
Solution :
Given:
15, 19, 21, 25, 27, ?
Add 4 and 2 alternately to the previous term to obtain the missing term.
15 + 4 = 19; 19 + 2 = 21; 21 + 4 = 25; 25 + 2 = 27; 27 + 4 = 31
So, 31 is the missing term in the given series. Hence, the first option is correct.
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