Find the sum of all 2 digit natural numbers divisible by 5
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Answer:
a=10
d=5
l=95
as numbers will be in AP
so
95=10+(n-1)5
95=5n+5
n=90/5
n=18
and now sum,s=n/2(a+l)
so sum =9(105)
sum=945
so your answer is 945
hope it helped u
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