if PIPE is coded as 20,CLUB is coded as 25, WING is coded as 27, then what will be the code for LOCK ?

if you sum the positions you get: PIPE(46)---> 20 (difference of 26) CLUB(38)---> 25(difference of 13) WING(53)--->27(difference of 26) LOCK(41)----> should be difference of 13 (41-13=28) so 28 should be the ans. (Not sure)