The following question is based on the following alphabet series.
A B C D E F G H I J K L M
N O P Q R S T U V W X Y Z
If every even letter beginning from B is replaced by odd number biginning with 3, which letter/number will be the third to the right of the tenth number/letter counting from your right ?
The new series is :
A 3 C 5 E 7 G 9 I 11 K 13 M
15 O 17 Q 19 S 21 U 23 W 25 Y 27
Counting from the right, the tenth character is Q.
The third character to the right of Q is 21.