In a certain code language, '524' means 'are you fine', '785' means 'you come home' and '6271' means 'we are at home'. What is the code for 'come home' in the same language?

87

Given; In a certain code language, '524' means 'are you fine', '785' means 'you come home' and '6271' means 'we are at home'. 

So,

5   2   4  =  are   you   fine

7   8   5  =  you   come   home

6   2   7   1  =  we   are   at   home

Thus, 

5 is coded as you, 2 is are, 7 is home, 4 i fine, 8 is come, 

6 or 1 is coded as we or at

Therefore, come home will be coded as 8 7