Which letter cluster will replace the question mark (?) to complete the given series?
QJKE, SHIG, UFGI, ?, YBCM
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. WDEK.
Q + 2 = S; S + 2 = U; U + 2 = W; W + 2 = Y
J - 2 = H; H - 2 = F; F - 2 = D; D - 2 = B
K - 2 = I; I - 2 = G; G - 2 = E; E - 2 = C
E + 2 = G; G + 2 = I; I + 2 = K; K + 2 = M