Okay. So if its less than 200 and greater than 100, its going to be in the 100's range. So you have 1_ _. Now, the ones digit (the last one on the right) is 5 less than 10, which is 5. So now you have 1_5. And last but not least, the tends digit is 2 more than the ones, and 5+2=7. Therefore, the answer is 175.