Question

Select the option that represents the letters that, when placed from left to right in the same sequence in the blanks below, will complete the letter series.

C P R D T R N T R N T P _ N

• A. TNPEPFR
• B. TPNDPFR
• C. TNTEPFP
• D. PNPERFP

Answer 1

Answer:

A. TNPEPFR

The correct sequence of letters to fill the blanks is D, N, P, C, P, C, D, R.

When these letters are filled in, the complete series becomes:
C D P R N D T P R N C T P R N C T P D N

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1. Count the Total Positions:
   The entire series consists of 20 positions (including letters and blanks). A 20-letter repeating series is usually broken down into 4 groups of 5 letters, or 5 groups of 4 letters.

2. Identify the Underlying Pattern:
   Let's divide the series into groups of 5 letters each:

   • Group 1: C _ P R _

   • Group 2: D T _ R N

   • Group 3: _ T _ R N

   • Group 4: _ T P _ N

   Looking closely at the second half of Group 2 (R N), Group 3 (R N), and the N at the end of Group 4, we can see a clear repeating structure. The core 5-letter template shifting through the sequence is C D P R N, but notice how the first letter cyclically increments or alternates (C $\rightarrow$ D $\rightarrow$ C $\rightarrow$ C/D pattern).Let's check the placement logically:

   • Group 1: C D P R N $\rightarrow$ (Forms CDPRN)

   • Group 2: D T P R N $\rightarrow$ (Forms DTPRN - note that the second letter changes to T)

   • Group 3: C T P R N $\rightarrow$ (Forms CTPRN)

   • Group 4: C T P D N $\rightarrow$ (Forms CTPDN)

3. Fill in the Blanks Sequentially:

   • 1st blank: D (completing C D P R ...)

   • 2nd blank: N (completing the first group ... R N)

   • 3rd blank: P (matching the middle P from other groups D T P R N)

   • 4th blank: C (starting the next segment C T P R N)

   • 5th blank: P (filling the middle position C T P R N)

   • 6th blank: C (starting the final segment C T P D N)

   • 7th blank: D (filling the second-to-last position C T P D N)

   • 8th blank: R (completing the terminal segment pattern)