In a certain code language, '471' means 'Hair is White', '726' means 'White Her Cow', and '639' means 'Cow gives Milk'. What is the code for 'Her' in that language?

2

Given; In a certain code language, '471' means 'Hair is White', '726' means 'White Her Cow', and '639' means 'Cow gives Milk'.

So,

Hair  is  White  =  4   7   1

White  her  Cow  =  7   2   6

Cow  gives  Milk  =  6   3   9

Thus,

Code for 'her' is 2.