Question
Which letter cluster will replace the question mark (?)
in the following series? IYZ, MTD, QOH, UJL, ?, CZTSolution
I + 4 = M, M + 4 = Q, Q + 4 = U, U + 4 = Y, Y+ 4 = C Y – 5 = T, T – 5 = O, O – 5 = J, J – 5 = E, E – 5 = Z Z + 4 = D, D + 4 = H, H + 4 = L, L + 4 = P, P + 4 = T
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