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If you write the numbers 1, 2, 3, ..., 10, 11, 12, ..., 99, 100, ..., what is the 100th digit you write?

 
 Jan 8, 2021
 #1
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There are 9 1 digit numbers so that's 9 digits. After 49 2 digit numbers you are at 99 digits and the next digit you'll write is a 5 as in 59.

:D

 
 Jan 8, 2021
 #2
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The 100th digit is the first 5 of 55

 

1 to 9 = 9

54 - 10 + 1 =45 two-digit numbers.

9 + (45 * 2) ==99 - which is 4 of 54

99 + 1 =100th digit is the first 5 of 55.

 
 Jan 8, 2021

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