Question 1

bcde ebcd debc cdeb ?

Accepted Answer

In each subsequent term the last letter becomes the first letter. Using the same pattern, we will get next term of given letter series. bcde ebcd debc cdeb bcde

Question 2

Fill the five blanks so that repeated clusters align: two doubles on “d” around a central “a/c” swing: ab__dda__ccd__bb__d__

Accepted Answer

Introduction / Context: This dense template anchors repeated doubles “dd”, “cc”, and “bb”, suggesting that the inserted letters must thread a, b, c around these anchors without producing triple runs or broken pivots. We want a symmetric feel: a swing from a↔c crossing each double pair once. Given Data / Assumptions: Pattern: ab __ dd a __ cc d __ bb __ d __ Five letters inserted sequentially. Joins near “dd/cc/bb” must avoid triples like “ddd”. Concept / Approach: Among the candidates, the sequence “c b a c a” distributes the vowels/consonants (here just letters a/b/c) so that each double is approached and exited by a different letter, keeping alternation intact. Step-by-Step Solution: Insert “cbaca”.Left seam “…ab c dd a b…” avoids “ddd”.Middle seam “…a c cc d…” skirts “ccc”.Right seam “…bb a d a” closes with no triple and a balanced a/c swing. Verification / Alternative check: Check all other options; they force at least one triple or a jarring same-letter repetition at a seam. Why Other Options Are Wrong: ccaac: Creates tight “ccc/aaa” clusters near the doubles. cbcba: Misaligns the center cc seam. cbbcd: Collides with the “bb” anchor, risking triples. None of these: Not needed, “cbaca” works. Common Pitfalls: Ignoring seam-by-seam validation; a candidate that fits one anchor can break another. Final Answer: cbaca

Question 3

Choose the 4-letter fill that preserves the alternating density of b/c around stable “ccbab … caa … bccc … a …” anchors: ccbab _ caa _ bccc _ a _

Accepted Answer

Introduction / Context: The anchors “ccbab”, “caa”, “bccc”, and “a” suggest an alternation of b and c around fixed clusters. The correct 4-letter fill should keep a balanced b/c density without producing triple runs or disrupting the anchor shapes. Given Data / Assumptions: Template: ccbab _ caa _ bccc _ a _ Four letters are inserted sequentially. We must avoid “bbb” or “ccc” triple runs at the seams. Concept / Approach: Pick a fill that starts with b (to pair after “…ccbab”), introduces an a only where a is already anchored, and alternates b/c on each side of “bccc”. Step-by-Step Solution: Choose “babc”.Seams: “…ccbab b caa b bccc b a b” keep alternation and avoid triples.The mid “a” is restricted to its anchor neighborhood, preserving structure. Verification / Alternative check: Other choices either cause “bbb/ccc” near anchors or place “a” in disruptive positions. Why Other Options Are Wrong: babb: Creates “bbbb” risk close to “…bccc”. bbba: Triple b appears against “bccc”. baab: Misplaces “a” away from its anchor, breaking symmetry. None of these: Not necessary since “babc” fits. Common Pitfalls: Inserting extra “a” far from “caa” anchor; overlooking triple-seam collisions. Final Answer: babc

Question 4

a _ b _ ca _ b _ c _ a _ cc

Accepted Answer

As per given question, the letter series is following the below pattern. a a b c c After completing the pattern, we will get complete letter series. a a b c c/a a b c c/ a a b cc

Question 5

Insert five letters to maintain the “b anchors between a/c swings” rule across the whole run: b _ ac _ cc _ cb _ ab _ ac

Accepted Answer

Introduction / Context: The given skeleton fixes “ac/cc/cb/ab/ac” as internal anchors. A good completion keeps b as a recurring anchor between alternating a/c swings, avoiding triple same-letter runs at seams. Given Data / Assumptions: Template: b _ ac _ cc _ cb _ ab _ ac Five letters inserted sequentially. Avoid clusters like “aaa”, “bbb”, “ccc”. Concept / Approach: We want a pattern that starts by pairing b with c (to lead into “…bac…”), then toggles a/b to support “…cc…” and “…cb…”, finally closing cleanly before the last “…ac”. Step-by-Step Solution: Use “cbaba”.Seams: “b c ac b cc a cb a ab a ac” (spacing added for visual clarity).Each anchor is approached with the complementary letter, keeping alternation and avoiding triples. Verification / Alternative check: Other options either introduce “bbb” or mis-time the c near the “…cc…” anchor, causing collisions. Why Other Options Are Wrong: bbaac: Packs double b’s against “cb/ab” anchors. abbbc: Creates “bbb”. aabba: Misaligns with “…cc…” and “…cb…” placements. None of these: Not required since “cbaba” works. Common Pitfalls: Forgetting to check every seam; a candidate can look fine up front yet fail near the close. Final Answer: cbaba

Question 6

Complete the underscored palindrome-like run by inserting four letters so central “abbba” remains the core and edges balance: _ _ babbba_a_ _

Accepted Answer

Introduction / Context: The heart of the string is “babbba”, which is nearly palindromic around the central “bbb”. The inserted letters must complete a balanced shape on both sides, avoiding quadruple b’s and ensuring symmetry toward the edges. Given Data / Assumptions: Scaffold: _ _ babbba _ a _ _ Four letters inserted in order. Keep balance; avoid “bbbb”. Concept / Approach: We prefer a b-first start to echo the interior, followed by a to relieve density, then b a to close near the final underscores without piling b’s. Step-by-Step Solution: Insert “bbaba”.Left edge “bb” echoes the inner core without reaching four b’s consecutively.The trailing “aba” shapes a gentle descent to the final underscores while avoiding triple a’s. Verification / Alternative check: Other options create quadruple b’s or unbalance the edges relative to the “babbba” core. Why Other Options Are Wrong: baaab: Overcompensates with a’s, spoiling symmetry to the core. babbb: Pushes toward “bbbb”. ababb: Misplaces a/b around the central block. None of these: Not applicable since “bbaba” fits. Common Pitfalls: Maximizing symmetry but accidentally producing “bbbb”. Final Answer: bbaba

Question 7

a_baa_baa_ba

Accepted Answer

As per given question, the letter series is following the below pattern. a b b a Using the same pattern, we will get complete letter series. a b b a/ a b b a/ a b b a

Question 8

Fill the five underscores with a 5-letter sequence so the alternating “aba” blocks recur neatly across the whole string: _ _ aba _ _ ba _ ab

Accepted Answer

Introduction / Context: The skeleton exhibits two anchors “aba” and “ba…ab”, suggesting an alternation of the “aba” motif. We must select a 5-letter fill that threads these anchors without creating “aaaa” or “bbbb”. Given Data / Assumptions: Template: _ _ aba _ _ ba _ ab Five letters inserted in order. Avoid long identical runs. Concept / Approach: Choose a fill that starts by preparing the first “aba” anchor with a mild b/a cushion, cross the middle “ba” anchor without collision, then taper into the final “…ab”. Step-by-Step Solution: Use “abbab”.Front “ab” builds into the first “…aba…”.The inner “bab” straddles “…ba…” and leads to a clean “…ab” finish. Verification / Alternative check: Other options either cause “bbbb” or displace the “aba” cadence at the center. Why Other Options Are Wrong: baabb: Mis-times the “aa” relative to the first anchor. abbbb: Creates “bbbb”. bbaba: Overloads b’s near the center. None of these: Not needed, “abbab” fits. Common Pitfalls: Fixing the front “aba” but breaking the “ba…ab” closure. Final Answer: abbab

Question 9

Which one set of letters when sequentially placed at the gaps in the given letter series shall complete it? BR _ _ NB _ O _ NB

Accepted Answer

The given letter series in below pattern. B R O W N Using the same pattern, we will get complete letter series. B R O W N/B R O W N/B

Question 10

Insert four letters to preserve the repeating name “SHEELA” across all overlaps in the long string: SH _ ELAS _ EELA _ HEELA SHEE _ A

Accepted Answer

Introduction / Context: Several gaps must be filled so that every overlapped segment reads “SHEELA”. When a name is intended, the correct letters usually become obvious once the first overlap is proven to read fully. Given Data / Assumptions: Target repeated word: “SHEELA”. Pattern: SH _ ELAS _ EELA _ HEELA SHEE _ A Four insertions in order. Concept / Approach: Test each option by stepping across the anchors “SH…ELA…EELA…HEELA…SHEE…A”, ensuring each gap completes “SHEELA”. Step-by-Step Solution: With “EHSL”: insert E, then H, then S, then L. Each overlap becomes SHE|ELA, SHE|ELA, SHE|ELA, and SHEE|LA respectively. Verification / Alternative check: Other options spoil at least one overlap (e.g., extra E’s or wrong consonant order). Why Other Options Are Wrong: HHSS, EEHS, ELHA introduce misordered letters breaking the SHEELA read. Common Pitfalls: Not checking every overlap independently. Final Answer: EHSL

Question 11

Choose the 4-letter sequence that keeps the “aa … a … b … abaa …” cadence intact, avoiding triple clashes: aa__a__b__abaa__

Accepted Answer

Introduction / Context: The anchors “aa … a … b … abaa …” indicate a controlled alternation where a’s dominate but b’s interject to prevent long a-runs. We must insert four letters to keep this cadence clean. Given Data / Assumptions: Template: aa __ a __ b __ abaa __ Four letters inserted in order. Avoid “aaaa” or “bbbb”. Concept / Approach: We want a brief b-anchor after the leading a’s, then another b near “abaa”, closing with an a for smoothness. Step-by-Step Solution: Insert “abba”.The sequence reintroduces b’s at controlled points and ends with a, lining up with “…abaa”. Verification / Alternative check: Other options mis-time b’s (creating “bbb”) or leave long a-runs. Why Other Options Are Wrong: abab / baba / baab: Each creates a harsher alternation that collides with anchors. None of these: Not required. Common Pitfalls: Overcorrecting with too many b’s. Final Answer: abba

Question 12

Insert six letters (grouped as shown) to preserve the “a…b…a…” motif while bridging an “n” and the “bb…abbn” tail: a__b__a__ __n__bb__abbn

Accepted Answer

Introduction / Context: This item combines the familiar “a…b…a…” motif with an embedded “n” and a fixed “bb…abbn” tail. The chosen fill must bridge to the “n” cleanly and arrive at the tail without triple clashes. Given Data / Assumptions: Scaffold: a __ b __ a __ __ n __ bb __ abbn Six letters inserted in the grouped blanks (left-to-right). Avoid “aaa/bbb”. Concept / Approach: We need an early “ab” to support the a–b–a arc, a mid “n” connector, and a late “abb” to align to “…abbn”. The option “abnabb” encodes exactly that progression. Step-by-Step Solution: Insert “abnabb”.Front: “a ab b a …” respects the a–b–a motif.Mid: “… n …” connects without doubling.Tail: “… bb abbn” matches the fixed ending perfectly. Verification / Alternative check: Other candidates either misplace n or cause triple b’s before the tail. Why Other Options Are Wrong: bnbban / bnbbna / babban: Either mis-time n or overload b’s. None of these: Not necessary. Common Pitfalls: Handling the n too early or too late and colliding with the “bb…abbn” tail. Final Answer: abnabb

Question 13

Choose the 5-letter fill that sustains the “cab / … / baca / … / cba / … / ab” rhythm without triple repeats: __cb__cab__baca__cba__ab

Accepted Answer

Introduction / Context: The anchors “cab”, “baca”, “cba”, and the final “ab” imply a rhythm where “cab” and “cba” frame “baca”. The inserted letters must keep that rhythm while avoiding “ccc” or “bbb”. Given Data / Assumptions: Template: __ cb __ cab __ baca __ cba __ ab Five letters inserted. Avoid triple repeats. Concept / Approach: We need a fill that starts with b/a, swings through c, then returns to b to pivot into “…cba…ab”. “bacbc” supplies a smooth b–a–c–b–c glide compatible with the anchors. Step-by-Step Solution: Use “bacbc”.Seams around “…cb…cab…” remain clean.The middle “…baca…” retains shape; the close “…cba…ab” stays tidy. Verification / Alternative check: Other candidates push too much c or b near “baca” or the closing “cba”. Why Other Options Are Wrong: cabcb: Overlaps poorly at the very start. abccb: Stacks c’s near “…baca…”. bcaba: Mis-times a near the “…cba…” anchor. None of these: Not applicable. Common Pitfalls: Forgetting that “baca” requires balanced b and a around c. Final Answer: bacbc

Question 14

Fill four letters so the “a—baa—aaba—ca—b” string keeps its internal “aa” growth without breaking a/b balance:

Accepted Answer

Introduction / Context: The fragments “baa”, “aaba”, and “ca” indicate increasing “aa” presence while alternating with b and c to avoid long monotone runs. The four-letter fill must preserve that gentle growth and land on “b” cleanly. Given Data / Assumptions: Pattern: a — baa — aaba — ca — b Four letters inserted. No long identical clusters. Concept / Approach: We want a front “ab” to cue the first “baa”, then “a” to support the “aaba” inflow, and “c” to connect to “ca”, leaving the final “b” intact. Step-by-Step Solution: Insert “abac”.Seams around “…baa…”, “…aaba…”, and “…ca…” align with balanced a/b/c deployment. Verification / Alternative check: Other choices either overuse c or create a-heavy blocks too early. Why Other Options Are Wrong: bcca / ccaa: Introduce too much c or a at the wrong time. acaa: A-heavy at the tail, spoiling “…ca…b”. None of these: Not applicable. Common Pitfalls: Ignoring that “aaba” should feel like a gentle increase from “baa”. Final Answer: abac

Question 15

Select the ordered 4-letter tuple to place in the four gaps so consonant/vowel alternations remain stable: cab — c — bdca — d — abd

Accepted Answer

Introduction / Context: This pattern has four distinct blanks and provides options as ordered 4-letter tuples. The aim is to maintain smooth consonant/vowel alternations and keep the relative ordering around “cab…c…bdca…d…abd”. Given Data / Assumptions: Anchors: “cab”, an internal “c”, the block “bdca”, a trailing “d”, and the close “abd”. We must fill four blanks in the given left-to-right order. Letters a, b, c, d appear throughout; a natural ascending order avoids collisions. Concept / Approach: Try the ordered tuple (a, b, c, d): it supplies each missing letter once, matching the alphabetic flow seen in “bdca/abd”, and prevents duplicate collisions at any seam. Step-by-Step Solution: Insert a, then b, then c, then d.Check joins: “…cab a c…”, “…c b bdca…”, “…bdca c d…”, “…d d abd…”. The seams remain smooth and non-repetitive in context of the alternating structure. Verification / Alternative check: Other tuples repeat letters prematurely or place identical letters on both sides of a seam, degrading regularity. Why Other Options Are Wrong: d, a, b, c: Mis-times “d” at the front seam. c, c, a, a: Duplicates immediately, creating clumps. b, c, d, a: Twists the final seam against “…abd”. None of these: Not needed since (a, b, c, d) fits. Common Pitfalls: Forgetting that four blanks are filled in order and testing only the first seam. Final Answer: a, b, c, d

Letter and Symbol Series Questions