mensa teaser

[ddon]

if xte = 39, amd = 10 and pul = 25,
fih = ?

[coinman]

flh= 10

a=1 b=2 c=3 etc

f+l-h

6+12-8

[johnalex]

ddon - convert letters to numerics:
eg 24 + 20 - 5 = 39 (You don't need any more help!) ja

[coinman]

or if it is f i h

6+9-8=7

cant tell if middle letter is i or l

[ddon]

Thanks both. I'd converted to numeric, but the next step eluded me (Friday Syndrome)
I had the caps on but AB converted to lower case. FIH