Find the sum of the multiples of 5 or 13 under 968

Find the sum of the multiples of 5 or 13 under 968

For example, if we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.

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1 Answer

????????????????? "natural numbers" ???????????

me ges yu meen INTEGER

me thank yu want 5+10+15+20+...965

sum=93,605

this be arithmatik sequens: start=5, step size=3, n=193, last=965

averaej=(start+end)/2=(965+5)/2=970/2=485

sum=n*averaej=193*485

###### if start with 13, step size=13...get n=74, averaej=487.5, sum=36,075
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