<p>I do decently well on the SAT math (I almost always score 700+), but I realized that I am having trouble with a specific type of problem.</p>

<p>Here are some examples of this specific type:</p>

<p>How many numbers between 1-1000 do not have 8 as a digit?</p>

<p>How many positive integers less than 1000 are multiples of 10 and are equal to 4 times an even integer?</p>

<p>How many multiples of 5 and 6 are less than 2000?</p>

<p>What trips me up is not that these problems are necessarily difficult but that we are required to complete them with great rapidity. Does anyone have any formulaic or rapid approaches to this specific problem type? What do you all do when you see something like this?</p>