Hey all – been trying to get better at these “sum of multiples” questions. An examples being “what is the sum of the multiples of 5 from 1 - 100”

Can someone confirm that this approach is correct in the below fake problem?

Question: “What are the sum of multiples of 4 from 75 - 205, inclusive?”

**Step 1:** Find # terms = ((204-76)/4 +1) = 33 terms

**Step 2:** Find median = (204 + 76)/2 = median of 140

**Step 3:** Multply: terms and median = **4620**

Is this right? I’ve tried double checking my work but can’t seem to find a good way to do so. Thanks!