All Exams Test series for 1 year @ ₹349 only
Question

Select the combination of letters that when sequentially placed in the blanks will create a repetitive pattern.

abb-a-b--bbb

This question was previously asked in
RRB NTPC 2019 CBT 1 Question Paper (8-Mar-2021) (Shift 2)
The correct answer is
bbba

Identify the Repetitive Pattern

The task is to fill the blanks in the given sequence '$abb-a-b--bbb$' to form a consistent, repetitive pattern.

Visualizing the sequence with blanks represented by underscores: $a b b _ a _ b _ _ b b b$

Determine the Pattern Sequence

We need to find which option, when placed sequentially into the blanks, creates a repeating pattern. Let's test the provided correct answer: Option 4: bbba.

Placing '$b$', '$b$', '$b$', and '$a$' into the four available blanks respectively yields:

  • Position 4: $b$
  • Position 6: $b$
  • Position 8: $b$
  • Position 9: $a$

The complete sequence becomes: $a b b b a b b b a b b b$.

Confirm Repetition

Observing the sequence $abbbabbabbb$, we can identify a clear repeating unit.

The sequence is composed of the unit '$abbb$' repeated three times:

$abbb$ | $abbb$ | $abbb$

Thus, the combination '$bbba$' successfully creates the required repetitive pattern.

Was this answer helpful?

Similar Questions

  1. In the following series, how many times is $5$ immediately preceded by $6$ but NOT followed by $9$?

     $8976597365432887776596546598765$

  2. Refer to the following number and symbol series and answer the question that follows. Counting to be done from left to right only. (Note: All numbers are single digit numbers only.)

    (Left) 6 2 & % 5 9 # 8 $ 7 + Ω @ 1 * £ 3 4 (Right)

    How many such symbols are there each of which is immediately preceded by another symbol and also immediately followed by a number?
  3. Refer to the following letter-symbol series and answer the question that follows.
    Counting is to be done from left to right only.
    (Left) 7 1 $ % 3 $ % 8 < 7 8 1 8 # < 7 @ * 5 5 + (Right)
    How many such numbers are there, each of which is immediately preceded by a symbol and also immediately followed by a symbol?
  4. Refer to the following number and symbol series and answer the question that follows.
    All numbers are single-digit. Counting to be done from left to right only.
    (Left) 4 6 @ 2 & % 8 $ 7 + 1 * £ 5 & 3 Ω 9 # (Right)
    How many such symbols are there each of which is immediately preceded by a number and also immediately followed by another number?
  5. Refer to the following number and symbol series and answer the question that follows.
    Counting to be done from left to right only.

    (Left) 0 3 # $\pi$ 2 $\sigma$ $\Omega$ 9 $ # 4 8 9 % 1 & 5 @ 8 6 $\mu$ (Right)

    How many such symbols are there, which are immediately preceded by a prime number and also immediately followed by a symbol?

  6. Study the given pattern carefully and select the letter that can replace the question mark (?) in it.

  7. Study the given pattern carefully and select the letter that can replace the question mark (?) in it. 

  8. How many 7s are there in the following series which are not immediately followed by 3 but immediately preceded by 8?
    898762263269732872778747794
  9. Study the given pattern carefully and select the option that can replace the question mark (?) in it.

     

  10. Study the given pattern carefully and select the number that can replace the question mark (?) in it.


Important Questions from Arrangement and Pattern

  1. Select the option that represents the correct order of the given words as they would appear in an English dictionary.

    1. Decline

    2. Decouple

    3. Decrease

    4. Decorate

    5. Decorum

    6. Decode 

  2. Select the option that represents the correct order of the given words as they would appear in an English dictionary.

    1. Penguins

    2. Pendants

    3. Penthouse

    4. Pendulum

    5. Pentagon

    6. Penalize

  3. Select the option that represents the correct order of the given words as they would appear in an English dictionary.

    1. Dissolve

    2. Display

    3. Distance

    4. Disturb

    5. Displace

    6. Dispute

  4. Which of the following options represents the correct order of the given words as they would appear in the English dictionary?

    1. Glob

    2. Globule

    3. Global

    4. Globe

    5. Gloom

  5. If the letters of the word ADISNHPANRKARFACHTARKYAR were written in reverse order, then which would be the third letter to the right of the ninth letter from the left?

Need Expert Advice?
Upcoming Exams
RRB ALP
July 28, 2026
RRB Group D
August 03, 2026
Test Series
RRB NTPC img
Railways
RRB NTPC Under Graduate 2026 New Mock Test Series
1459 Tests 2 Tests Free
213 Attempts
4.3(512)
English, Hindi, Telugu +7 More

Start Your Preparation with Prepp Mobile App

Download the app from Google Play & App Store
Download the app from Google Play & App Store
Prepp Mobile App