What is the unit digit of the sum of first 111 whole numbers? Craku?
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It will be 5
First 111 whole numbers means 0,1,2,.....,110
It can be considered as an ap with first tem 1 and common difference 1
(No need to add 0)
110th term is 110
So sum of first 110 numbers is
110/2(1+110)=6105
First 111 whole numbers means 0,1,2,.....,110
It can be considered as an ap with first tem 1 and common difference 1
(No need to add 0)
110th term is 110
So sum of first 110 numbers is
110/2(1+110)=6105
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