how many times does the digit 7 occurs if we write all the numbers from 1 to 200
pinky221122:
no it's wrong
Yeah, it's 40
This time I am sure its right
but when I counted it is 22
You have to count from 1 to 200
And there is the line of 70s
So, from 1 to 100 there are 20, you just need to double that
oh yes
I forgot about them
I thought so
Answers
Answered by
7
Given: The numbers from 1 to 200.
To find: How many times does the digit 7 occurs?
Solution:
- Now we have given the numbers from 1 to 200.
- First lets count from 1 to 100, we have numbers:
7, 17, 27, 37, 47, 57, 67, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 87 and 97.
- So the total are: 20 (77 is considered to have 2 seven)
- Now from 101 to 200, we have:
107, 117, 127, 137, 147, 157, 167, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 187 and 197
- So the total are: 20 (177 is considered to have 2 seven)
- So the total 7 from 1 to 200 are :
20 + 20 = 40
Answer:
So 7 occurs 40 times from 1 to 200.
Answered by
2
Answer:
Step-by-step explanation:
40 times
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