2 + 4 + 8 + 16 + 32 +64 + 128 + 256 + 512 + 1024 + 2048 + 4096 = 8190
You also happen to be the luckiest kid in the world to have such rich parents to give such a high allowance.
The answer is line segment
You first have to make the denominators the same 1/7x3/3 and 1/3 X 7/7
3/21 + 7/21 = 10/21
the answer is 10/21