Math, asked by army1055, 1 year ago

Find the sum of all three digit whole numbers which are multiples of 7.

Answers

Answered by BEJOICE
6
The numbers are 105, 112, 119, ...., 994
Number of terms
 \frac{994 - 105}{7}  + 1 = 128
Sum of terms
 \frac{128}{2}  \times (105 + 994) = 70336
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