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Noteclerical

Letter Series

Lesson 50 of 113

1. Ye topic hai kya?

Letter series = alphabet ki line, ek chhupa kadam. Number series jaisa kaam, bas A–Z pe.

Teen sawaal types

Next: agla letter/group
Missing: beech ka ?
Wrong: kaun sa letter pattern todta hai

Yahan kya nahi

Number series pehle topic. Coding-Decoding alag (WORD→pattern). Mix A2, C6 yahan — letter skip + number saath.

2. Pehla hathiyar — position yaad

Har letter ka number. Bina iske skip count galat hoga.

ABCDEFGHIJKLM
12345678910111213
NOPQRSTUVWXYZ
14151617181920212223242526
Do shortcuts (paper pe 5 second):
EJOTY = 5, 10, 15, 20, 25
Opposite: letter + pair = 27. A↔Z, B↔Y, C↔X, M↔N

CFILORUX = 3, 6, 9, 12, 15, 18, 21, 24 — 3 ke multiples.

3. Paper pe dimag kaise chale

Yahi order:
1) Positions likho (A=1…)
2) Consecutive ka gap (+2, +3, −2)
3) Gap khud badal raha? +1, +2, +3…
4) Wrap: Z ke baad A (26+1 → 1)
5) Odd/even alag (do series)
6) Opposite pairs (sum 27)
7) Groups: ABC, EFG jaise blocks
Galati: letters count karte hue starting letter dobara ginna. A se C = +2 (B skip, C land) — beech sirf B, lekin position 1→3 = +2.

4. Constant skip

Har kadam same jum. Boxes ke beech gap likho.

A1
+2
C3
+2
E5
+2
G7
+2
?

Agla 7+2=9 = I. Reverse: Z, X, V, T → −2 → R.

Basic · +2

Q1. A, C, E, G, ?

Solution shuru

  1. Step 1 — positions

    A=1, C=3, E=5, G=7.

  2. Step 2 — gaps

    +2, +2, +2. Constant.

  3. Step 3 — next

    7+2=9 = I.

Final answer — yahan khatamI

Gap badalta hai

Pehli gaps 2, 3, 4, 5… Number series ke second-gap jaisa.

Basic · +n badhta

Q2. A, C, F, J, ?

Solution shuru

  1. Step 1 — positions

    A=1, C=3, F=6, J=10.

  2. Step 2 — gaps

    +2, +3, +4. Agli gap +5.

  3. Step 3 — next

    10+5=15 = O.

Final answer — yahan khatamO

Wrap — Z ke baad A

Alphabet circle hai. 26 ke baad 1. Formula: position ko 26 se mod, 0 matlab Z.

Medium · Wrap

Q3. X, Y, Z, A, ?

Solution shuru

  1. Step 1 — consecutive?

    X Y Z A — dictionary order, Z ke baad A. Wrap.

  2. Step 2 — gap

    Har kadam +1. A+1 = B.

Final answer — yahan khatamB

+3 wrap: Y+3 = B (Y Z A B). Y=25, 25+3=28, 28−26=2 = B.

5. Opposite letters (A↔Z)

Pair ka sum 27. A+Z=27, B+Y=27. Series aksar: seedha ek, ulta ek.

LetterOppositeLetterOpposite
AZBY
CXDW
EVFU
GTHS
IRJQ
KPLO
MN——
Medium · Opposite

Q4. A, Z, B, Y, C, ?

Solution shuru

  1. Step 1 — consecutive gap

    A→Z bada jump. Alternate socho.

  2. Step 2 — odd seats

    A, B, C → +1. Agli odd D, lekin ? even (6th).

  3. Step 3 — even seats

    Z, Y, ? → −1. Y−1 = X. Check: A↔Z, B↔Y, C↔X. Opposite rule. Fit.

Final answer — yahan khatamX

6. Alternate — do letter-series

Number series jaisa: odd positions ek skip, even doosra.

Medium · Alternate

Q5. A, B, D, E, G, H, ?

Solution shuru

  1. Step 1 — consecutive

    +1, +2, +1, +2, +1 — palat. Do series.

  2. Step 2 — odd

    A, D, G → +3. Agli odd J, lekin ? 7th = odd. To ? = G+3 = J.

  3. Step 3 — even check

    B, E, H → +3. Consistent. Line: A B D E G H J.

Final answer — yahan khatamJ

Pehle gino ? kaun si seat hai. Galat series mat nikaalna.

7. Groups (ABC, EFG…)

Har term 2–3 letters ka block. Andar skip, blocks ke beech skip — do levels.

Medium · Group

Q6. ABC, EFG, IJK, ?

Solution shuru

  1. Step 1 — block ke andar

    ABC consecutive. EFG consecutive. IJK consecutive. Andar +1, +1.

  2. Step 2 — blocks ke beech

    ABC ke baad D chhoot, phir EFG. EFG ke baad H chhoot, phir IJK. Har group ke baad 1 letter skip.

  3. Step 3 — next

    IJK ke baad L skip, phir MNO.

Final answer — yahan khatamMNO
Pro · Group pattern

Q7. ABD, EFH, IJL, ?

Solution shuru

  1. Step 1 — andar

    A, B, D = +1, +2. E, F, H = +1, +2. I, J, L = +1, +2. Har block: consecutive, phir ek skip.

  2. Step 2 — pehla letter

    A, E, I = +4, +4. Agli start = I+4 = M.

  3. Step 3 — block banao

    M, M+1=N, N+2=P → MNP.

Final answer — yahan khatamMNP

8. Wrong letter aur missing

Wrong: next mat likho. Ek letter replace karke poori chain fit karni hai. Missing: dono taraf se same gap.

Medium · Wrong

Q8. A, D, G, J, M, P, S, U — galat letter kaun sa?

Solution shuru

  1. Step 1 — positions

    1, 4, 7, 10, 13, 16, 19, 21.

  2. Step 2 — gaps

    +3, +3, +3, +3, +3, +3, +2. Last gap toot.

  3. Step 3

    19+3=22 = V, line mein U=21. Sirf last galat. U ki jagah V.

Final answer — yahan khatamU (hona chahiye V)
Basic · Missing

Q9. C, F, I, ?, O, R

Solution shuru

  1. Step 1 — left

    C=3, F=6, I=9 → +3. ? = 12 = L.

  2. Step 2 — right

    L+3=O, O+3=R. Fit.

Final answer — yahan khatamL

9. Letter + number mix

Letter apna skip, number apna (AP/×). Alag-alag lock, phir jodo.

Pro · Mix

Q10. A2, C6, E12, G20, ?

Solution shuru

  1. Step 1 — letters

    A, C, E, G → +2. Agli letter I.

  2. Step 2 — numbers

    2, 6, 12, 20. Gaps +4, +6, +8. Agli gap +10 → 30.

    Ya 1×2, 2×3, 3×4, 4×5, agla 5×6=30. Same.

  3. Step 3 — jodo

    I30.

Final answer — yahan khatamI30

10. Pro checklist

  1. Pehle positions. Head-count se skip mat gino jab tak habit na pade.
  2. EJOTY / 27-pair yaad — opposite 2 second mein.
  3. Wrap: 26 se upar jaaye to −26.
  4. Groups mein andar ka rule aur beech ka skip alag.
  5. Vowels (A E I O U) kabhi khud series; LDC mein kam, soch last.
  6. Wrong vs next: galat type mat solve karna.

11. Practice — basic se pro, poora solution

Upar Q1–Q10 theory ke saath. Yahan Practice 1–10 alag. Format: sawaal → Solution shuru → steps → Final answer.

Basic

Practice 1. Z, X, V, T, ?

Solution shuru

  1. Step 1

    Z=26, X=24, V=22, T=20. Har −2. Q1 wala A,C,E +2 nahi. P2 wala −3 nahi.

  2. Step 2

    20−2=18 = R.

Final answer — yahan khatamR
Basic

Practice 2. Z, W, T, Q, ?

Solution shuru

  1. Step 1

    Z=26, W=23, T=20, Q=17. Gaps −3.

  2. Step 2

    17−3=14 = N.

Final answer — yahan khatamN
Medium

Practice 3. A, Z, C, X, E, V, ?

Solution shuru

  1. Step 1 — odd

    A, C, E → +2. ? 7th = odd. Agli = E+2 = G.

  2. Step 2 — even check

    Z, X, V → −2. Opposite: A↔Z, C↔X, E↔V, G↔T (agle even). Odd wala sawaal G.

Final answer — yahan khatamG
Medium

Practice 4. A, B, D, G, K, ?

Solution shuru

  1. Step 1

    1, 2, 4, 7, 11. Gaps +1, +2, +3, +4. Agli +5.

  2. Step 2

    11+5=16 = P.

Final answer — yahan khatamP
Medium · Wrap

Practice 5. Y, Z, A, B, ?

Solution shuru

  1. Step 1

    +1 har kadam. Wrap Z→A already dikh raha.

  2. Step 2

    B+1 = C.

Final answer — yahan khatamC
Medium

Practice 6. P, Q, S, V, ?

Solution shuru

  1. Step 1

    P=16, Q=17, S=19, V=22. Gaps +1, +2, +3. Agli +4.

  2. Step 2

    22+4=26 = Z.

Final answer — yahan khatamZ
Pro · Group

Practice 7. AZ, BY, CX, DW, ?

Solution shuru

  1. Step 1 — pehla letter

    A, B, C, D → +1. Agli E.

  2. Step 2 — doosra

    Z, Y, X, W → −1. Agli V. Opposite: E↔V.

Final answer — yahan khatamEV
Pro · Wrong

Practice 8. B, E, H, K, N, Q, T, W, Y — galat kaun?

Solution shuru

  1. Step 1

    B=2 se +3: E, H, K, N, Q, T, W, Z. Last Y=25, chahiye 26=Z.

  2. Step 2

    Pehle 8 theek. Sirf Y galat.

Final answer — yahan khatamY (hona chahiye Z)
Basic · Missing

Practice 9. Z, X, U, Q, ?

Solution shuru

  1. Step 1

    26, 24, 21, 17. Gaps −2, −3, −4. Agli −5. Q9 wala +3 (C,F,I) nahi.

  2. Step 2

    17−5=12 = L.

Final answer — yahan khatamL
Pro · Mix

Practice 10. D4, F6, H8, ?

Solution shuru

  1. Step 1 — letters

    D, F, H → +2. Agli J.

  2. Step 2 — numbers

    4, 6, 8 → +2. Agli 10. (D=4, F=6, H=8 — letter position khud number hai.)

Final answer — yahan khatamJ10

12. Itna kaafi hai kya?

Agar tum:

  • A=1…Z=26 aur opposite (27) bina soch ke laga sako
  • constant skip, badhta skip, wrap alag kar sako
  • alternate aur groups ke do levels dekh sako
  • wrong / missing / next mix na karo

to JA/CA-II ke letter series basic se pro tak attempt ho sakte hain.

Agle topic: Odd man out.

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