In the given series, if 10 letters/numbers from right are put in the reverse order, then which letter/number will be the 3rd to the right of 22nd letter/number from left end A 2 C 4 E 6 G 8 I 10 K 12 M 14 O 16 Q 18 S 20 U 22 W 24 Y 26?

Based on given series:

A 2 C 4 E 6 G 8 I 10 K 12 M 14 O 16 Q 18 S 20 U 22 W 24 Y 26

1) If 10 letters/numbers from right are put in the reverse order:

Left End           A 2 C 4 E 6 G 8 I 10 K 12 M 14 O 16 26 Y 24 W 22 U 20 S 18 Q          Right End

2) 22^nd letter/number from left end: U                     

3) Number which is 3^rd to the right of 22^nd letter from left end (which means, 25^th letter from the right end)

Left End           A 2 C 4 E 6 G 8 I 10 K 12 M 14 O 16 26 Y 24 W 22 U 20 S 18 Q          Right End

Hence, 18 is the correct answer.