Gr.10 Precal Question?
"Find the sum of all multiples of 3 between 100 and 700"
Not too sure how to go about this one. Your help is much appreciated. Thanks!
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"Find the sum of all multiples of 3 between 100 and 700"
Not too sure how to go about this one. Your help is much appreciated. Thanks!
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add 3 + 100 and then multiply by 49... 3 + 100 = 103 and so does 4+99, and 5+98 and so forth... there are 49 sets of numbers adding to 103 so 49 x 103 = 5047
3 + 700 = 703
703 x 349= 245,347