In the given series what will replace the question mark - J/8, P/14, Q/15, W/21, ?

Answer 1

Looks like it is X/22

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J/8---> 10/8 10-8=2
P/14---> 16/14 (+6 difference between P and J alphabet order) 16-14=2
Q/15---> 17/15 (+1) 17-15=2
W/21---> 23/21 (+6) 23-21=2
X/22---> 24/22 (+1) 24-22=2