The first example is 1010, that is (I'm considering the binary digits from right to left):

0 * 2⁰ + 1 * 2¹ + 0 * 2² + 1 * 2³

Your second example is 100. As usual, from right to left...

0 * 2⁰ + 0 * 2¹ + 1 * 2²

Got the pattern? Now I'm going to check what powers of 2 are on (i.e. multiplied by 1). In the first example they are 2¹ (Monday) and 2³ (Wednesday). In the second example only 2², Tuesday.

I hope this will clarify my node.