Today's **Brain Game **asks a single question: What's the next number in the following sequence?

1, 1, 2, 1, 2, 2, 3, ?

**THE SOLUTION:**

**The numbers represent the number of "on" switches (or "ones") when counting upward in binary:**

**1 = 0001
2 = 0010
3 = 0011
4 = 0100
5 = 0101
6 Â = 0110
7 = 0111, so...**

**8 = 1000**