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19-01-2017
Mathematics

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Let s be the sum of all digits used in writing all numbers from 1 to 1010.find s

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19-01-2017

We know, s = n/2 [a + l ]
Here, n = 1010
a = 1
l = 1010

Substitute their values,
s = 1010/2 [1 + 1010]
s = 505 [ 1011]
s = 510555

In short, Your Answer would be 5,10,555

Hope this helps!

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