We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
183
2
avatar+105 

How many times does the digit 9 appear in the list of all integers from 1 to 500? (The number 99, for example, is counted twice, because 9 appears two times in it.)

 Oct 3, 2018
 #1
avatar
+1

Here are ALL the digits from 0 to 9 in 1 to 500:

 

(0=91, 1=200, 2=200, 3=200, 4=200, 5=101, 6=100, 7=100, 8=100, 9=100)

 Oct 3, 2018
 #2
avatar+102441 
+1

1 digite numbers      1 time

2 digits up to 89          8 times

90 to 98                    9 times

99                             2 times

total so far is 20

100 and something   20times

200 and something   20 times

300 and something   20 times

400 and something   20 times

 

Total os   5*20 = 100 times

 Oct 3, 2018
edited by Melody  Oct 3, 2018

8 Online Users

avatar
avatar