I don't suppose anyone knows anything about functions in HOPE?

I've got this question I'm having trouble with:

Q. Write a function with two integer parameters which will determine whether the larger integer is odd.

I've got this function to find the larger integer which works:

dec max : num#num -> num;
--- max (x,y) y)
then x
else y;

but I did this function to find the odd integer but it doesn't work:
dec isodd : num -> truval;
--- isodd (x,y) truval;
--- isodd x

Man that takes me back...and reminds me that I don't remember jack # about it... Sorry John...though I'm sure there are some students here, who it's a lot more fresh for...good luck!

It's ok I figured it out thank God, this is one module I'm not digging at all.