Find the sum ofall2 digit positive numbers divisible by 3
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sneha40101:
I'm from Chennai
you use the face book
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yar
no i don't use fb
în which class do you read
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yar
10th
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ATQ,
the AP formed is 10,11,12,.......,99
a=10
d=1
to find number of terms:
n=l-a\d+1
n=99-10÷1+1
we get,
n=90
using sn formula,we get
sn=n÷2(2a+(n-1)×d)
45(20+89)
45×109
5905
∴the answer is 5905
the AP formed is 10,11,12,.......,99
a=10
d=1
to find number of terms:
n=l-a\d+1
n=99-10÷1+1
we get,
n=90
using sn formula,we get
sn=n÷2(2a+(n-1)×d)
45(20+89)
45×109
5905
∴the answer is 5905
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