When writing numbers from 1 to 10,000, how many times is the digit 9 written?
Solution:Option(C) is correct
The digits 9 occurs in the thousands place in 1000 numbers.
It occurs in the hundreds place in 1000 numbers and so on
The digit occurs 4000 times.
Edit: For an alternative solution, check comment by Sravan Reddy.
Error(s) Found !!!
Sravan Reddy (Mar 22'16 at 15:29)
By writing all numbers in 4 digit form like 0000,0001,0002....0011,0012...0100,0101...1000,1001...9999.
There is total of 10,000 numbers above and all are 4 digit numbers.
So total digits used is 40,000 and due to symmetry each digit repeats equally. i.e, 4000 times.
So, answer is 4000
GayathriRaju (Sep 09'14 at 18:21)
I cant understand the answer in this question
Saustav (Mar 11'14 at 22:32)
I calculated in excel, the total count comes to 3439.
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To write Maths use $ or $$ delimiters. (TeX)Ex: $ax^2+bx+c=0$.
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