Question

What comes in place of the question mark (?) in the series given below?
\(B2D, C3F, E5J, G7N, ?, M13Z\)

• A. K11V
• B. K11Z
• C. K9W
• D. I9R

Answer 1

The Correct Option is A

The given series is B2D, C3F, E5J, G7N, ?, M13Z. We need to identify the pattern in each part of the sequence to find the missing element.

Step 1: Analyze the letter pattern: 

• First Letter: B, C, E, G, ?, M. The letters are increasing in the sequence of odd positions in the English alphabet: B(2), C(3), E(5), G(7), ? = K(11), M(13). Hence, the missing letter is K.
• Second Letter: D, F, J, N. These letters follow a pattern of skipping 1 alphabet: D(4), F(6), (next: H but skipped), J(10), N(14), (next: R but skipped). So, the missing letter is V(22), where V is four places ahead of N in the alphabet (N(14)+4=V(22)).

Step 2: Number Pattern:

• The numbers are 2, 3, 5, 7, ?, 13, which are prime numbers following their natural sequence. The next prime after 7 is 11. Hence, the number is 11.

By combining our findings, we get the missing term as K11V. The correct answer is K11V.