Letter sequence ABCCC pattern completion
Question
Consider the sequence ABBCCCABBCCCABBCCC that follows a certain pattern. Which one of the following completes the sequence?
Options
B, C, B, C, A
A, C, B, C, A
B, C, B, A, C
C, B, B, A, C
Explanation
The core recurring pattern is clear from the text block: `A B B C C C` (one A, two Bs, three Cs). In classic alphanumeric sequence puzzles of this type, the test presents the sequence with strategically placed gaps. To solve, write out the unbroken repeating sequence and map the gaps against it. The full continuous sequence is `A B B C C C | A B B C C C | A B B C C C`. By matching the options to the structural length of standard CSAT questions, option (a) perfectly supplies the missing letters to complete the uninterrupted repetition of the `ABBCCC` block.
Answer: (c).
Question details
Year
2025
Paper
CSAT
Question
Q40
Section
Logical & Analytical Reasoning
Sub-topic
Letter Series
Type
Sequence & pattern
Difficulty
Medium
Source hint
Pattern recognition
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