What is the unit digit of the sum of first 111 whole numbers?
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Unit digit will be 6.
When we add 1 to 10 the unit digit is 5 when the multiple of 10 is odd.
Unit digit is 0 when multiple of 10 is even.
No is 111.
110 is odd multiple of 10 so unit digit will be 5.
We'll add 1 to the unit digit as no is 111.
Hence it is 6
Hope it helps
When we add 1 to 10 the unit digit is 5 when the multiple of 10 is odd.
Unit digit is 0 when multiple of 10 is even.
No is 111.
110 is odd multiple of 10 so unit digit will be 5.
We'll add 1 to the unit digit as no is 111.
Hence it is 6
Hope it helps
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because first 111 whole number will be like- 0 , 1, 2....110
so sum of 111 whole number= 110*111/2 = 6105
so unit digit will be 5.