Question

Find the sum of first 35 terms between 1 to 200 which are multiples of 5​

Answer 1

Answer:

3150

Step-by-step explanation:

First term, a = 5

Last term, l = 35×5 = 175

Number of terms, n = 35

$Sum \: = \: \frac{n}{2} (a + l) \\ = \frac{35}{2} \times (5 + 175) \\ = \frac{35}{2} \times 180 \\ = 35 \times 90 \\ = 3150$

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