Boolean Algebra, Finding subscript for P and S

[multiix]

Homework Statement

Identify the equivalent binary numbers of the following P term and S terms( which are the subscripts of P's and S's)
Ex:
P_?=AB'CD'

Homework Equations

No equations that I know of

The Attempt at a Solution

I create an table to find the subscripts for P and S but some of the questions of 6 digit which will take forever to make a table for.
My questions is, is there a shorter way??

P_?=AB'CD'=1010=P₁₁ <---Found the subscript by making a table

 

[multiix]

I found the Answer!

so P?=AB'CD'=1010

1010 corresponds to

₈₄₂₁
1010 Sooo 1(8)+0(4)+1(2)+0(1)=11

so the subscript of P is 11