What is the unit digit of the sum of first 111 whole numbers? The whol
| What is the unit digit of the sum of first 111 whole numbers?
A. 4
B. 6
C. 5
D. 0
Right Answer is: C
SOLUTION
The whole numbers start from 0,1,2,3…
∴ Sum of the first 111 whole numbers is
Sum = 
Now because 0 will not disturb the sum , therefore the number of terms will be 110.
= 
Hence the unit digit is 5.
Special Note: As whole number starts from 0….So, 111th whole number is 110
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What is the unit digit of the sum of first 111 whole numbers? The whol