A painter is hired to paint the number 1 through 100 on 100 apartments.how many times would he have to paint the number 8 ?plz tell me with explanation
Answers
The painter have to paint the number 8, 20 times.
Step-by-step explanation:
Given:- Number 1 to 100 is getting painted on 100 apartments.
To find:- How many times number 8 will get painted from number 1 to 100.
Solution:-
From number 1 to 10 number 8 appears as = 8 = 1 time appeared.
From number 11 to 20 number 8 appears as = 18 = 1 time appeared.
From number 21 to 30 number 8 appears as = 28 = 1 time.
From number 31 to 40 number 8 appears as = 38
From number 41 to 50 number 8 appears as = 48
From number 51 to 60 number 8 appears as = 58 = 1 time appeared.
From number 61 to 70 number 8 appears as = 68 = 1 time appeared.
From number 71 to 79 number 8 appears as = 78 = 1 time appeared.
From number 80 to 89, number 8 appears as = 80,81,82,83,84,85,86,87,88,89 = 11 times appeared.
From number 90 to 100 number 8 appears as = 98 = 1 time appeared.
Therefore from number 1 to 100 number 8 appears = 1+1+1+1+1+1+1+1+11+1 = 20 times.
Therefore numbers 8 appears 20 times from 1 to 100.