Question 26
Select the option that can replace the question mark (?) in the following series.
NB, OA, PZ, QY, ?
Solution
NB ==> (N+1) (B-1) ==> OA
OA ==> (O+1) (A-1) ==> PZ
PZ ==> (P+1) (Z-1) ==> QY
QY ==> (Q+1) (Y-1) ==> RXHere 'RX' will come in place of the question mark.
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