PlacementPrepWhat comes next: C, G, K, O, S, ?
Solution
Each letter moves 4 places forward: C → G → K → O → S.
S + 4 = W.
Answer: (C) W
Logical Reasoning · Series and patterns
Letter Series: placement practice questions
30 moderate questions in the pattern of campus placement tests. Pick an option to check your answer, then open the step-by-step solution.
What comes next: KQ, NN, QK, TH, ?
Solution
First letters move forward by 3: K, N, Q, T.
Second letters move backward by 3: Q, N, K, H.
Next pair: WE.
Answer: (B) WE
What comes next: EGI, HJL, KMO, NPR, ?
Solution
Within a group, letters go up by 2. Each group starts 3 letters after the previous one.
So the next group starts at Q: QSU.
Answer: (D) QSU
Which letter replaces the question mark: E, H, ?, N, Q, T
Solution
The letters move 3 places each time.
So ? = H + 3 = K.
Answer: (A) K
What comes next: B, F, J, N, R, ?
Solution
Each letter moves 4 places forward: B → F → J → N → R.
R + 4 = V.
Answer: (D) V
What comes next: AT, DQ, GN, JK, ?
Solution
First letters move forward by 3: A, D, G, J.
Second letters move backward by 3: T, Q, N, K.
Next pair: MH.
Answer: (B) MH
What comes next: GIK, JLN, MOQ, PRT, ?
Solution
Within a group, letters go up by 2. Each group starts 3 letters after the previous one.
So the next group starts at S: SUW.
Answer: (A) SUW
Which letter replaces the question mark: B, D, F, ?, J, L
Solution
The letters move 2 places each time.
So ? = F + 2 = H.
Answer: (D) H
What comes next: EX, GV, IT, KR, ?
Solution
First letters move forward by 2: E, G, I, K.
Second letters move backward by 2: X, V, T, R.
Next pair: MP.
Answer: (C) MP
What comes next: FGH, JKL, NOP, RST, ?
Solution
Within a group, letters go up by 1. Each group starts 4 letters after the previous one.
So the next group starts at V: VWX.
Answer: (A) VWX
Which letter replaces the question mark: E, I, ?, Q, U, Y
Solution
The letters move 4 places each time.
So ? = I + 4 = M.
Answer: (A) M
What comes next: ES, GQ, IO, KM, ?
Solution
First letters move forward by 2: E, G, I, K.
Second letters move backward by 2: S, Q, O, M.
Next pair: MK.
Answer: (C) MK
What comes next: CDE, HIJ, MNO, RST, ?
Solution
Within a group, letters go up by 1. Each group starts 5 letters after the previous one.
So the next group starts at W: WXY.
Answer: (A) WXY
Which letter replaces the question mark: B, D, F, H, ?, L
Solution
The letters move 2 places each time.
So ? = H + 2 = J.
Answer: (B) J
What comes next: D, G, J, M, P, ?
Solution
Each letter moves 3 places forward: D → G → J → M → P.
P + 3 = S.
Answer: (C) S
What comes next: GY, HX, IW, JV, ?
Solution
First letters move forward by 1: G, H, I, J.
Second letters move backward by 1: Y, X, W, V.
Next pair: KU.
Answer: (D) KU
What comes next: GHI, LMN, QRS, VWX, ?
Solution
Within a group, letters go up by 1. Each group starts 5 letters after the previous one.
So the next group starts at A: ABC.
Answer: (A) ABC
Which letter replaces the question mark: D, ?, H, J, L, N
Solution
The letters move 2 places each time.
So ? = D + 2 = F.
Answer: (C) F
What comes next: BP, EM, HJ, KG, ?
Solution
First letters move forward by 3: B, E, H, K.
Second letters move backward by 3: P, M, J, G.
Next pair: ND.
Answer: (B) ND
What comes next: ACE, EGI, IKM, MOQ, ?
Solution
Within a group, letters go up by 2. Each group starts 4 letters after the previous one.
So the next group starts at Q: QSU.
Answer: (C) QSU
Which letter replaces the question mark: B, E, ?, K, N, Q
Solution
The letters move 3 places each time.
So ? = E + 3 = H.
Answer: (D) H
What comes next: GQ, HP, IO, JN, ?
Solution
First letters move forward by 1: G, H, I, J.
Second letters move backward by 1: Q, P, O, N.
Next pair: KM.
Answer: (C) KM
Which letter replaces the question mark: C, F, ?, L, O, R
Solution
The letters move 3 places each time.
So ? = F + 3 = I.
Answer: (B) I
What comes next: CEG, GIK, KMO, OQS, ?
Solution
Within a group, letters go up by 2. Each group starts 4 letters after the previous one.
So the next group starts at S: SUW.
Answer: (B) SUW
What comes next: F, J, N, R, V, ?
Solution
Each letter moves 4 places forward: F → J → N → R → V.
V + 4 = Z.
Answer: (A) Z
What comes next: C, F, I, L, O, ?
Solution
Each letter moves 3 places forward: C → F → I → L → O.
O + 3 = R.
Answer: (A) R
What comes next: H, K, N, Q, T, ?
Solution
Each letter moves 3 places forward: H → K → N → Q → T.
T + 3 = W.
Answer: (B) W
What comes next: G, J, M, P, S, ?
Solution
Each letter moves 3 places forward: G → J → M → P → S.
S + 3 = V.
Answer: (D) V
Which letter replaces the question mark: C, E, G, I, ?, M
Solution
The letters move 2 places each time.
So ? = I + 2 = K.
Answer: (D) K
What comes next: A, D, G, J, M, ?
Solution
Each letter moves 3 places forward: A → D → G → J → M.
M + 3 = P.
Answer: (C) P
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