In the following series, only one letter-cluster is incorrect. Select the incorrect letter-cluster.

ZXU SQN LKI ECZ XVS

Question

In the following series, only one letter-cluster is incorrect. Select the incorrect letter-cluster.

ZXU SQN LKI ECZ XVS

Accepted Answer

Let's analyze the series: ZXU, SQN, LKI, ECZ, XVS.

Step 1: Check the pattern in each cluster.

- ZXU: Letters are Z, X, U.
  Positions in alphabet: Z(26), X(24), U(21)
  Differences: 26 to 24 = -2, 24 to 21 = -3

- SQN: S(19), Q(17), N(14)
  Differences: 19 to 17 = -2, 17 to 14 = -3

- LKI: L(12), K(11), I(9)
  Differences: 12 to 11 = -1, 11 to 9 = -2

- ECZ: E(5), C(3), Z(26)
  Differences: 5 to 3 = -2, 3 to 26 = +23 (which is effectively -3 if we consider wrap-around)

- XVS: X(24), V(22), S(19)
  Differences: 24 to 22 = -2, 22 to 19 = -3

Step 2: Identify the pattern.
Most clusters have differences of -2 and -3 between consecutive letters.

Step 3: Identify the incorrect cluster.
LKI has differences of -1 and -2, which does not fit the pattern.

Therefore, LKI is the incorrect letter-cluster.

Answer

Answer

Answer