Explanation

To determine how many times the digit 3 appears from 1 to 100, let's count its occurrences carefully.

Counting 3s in the unit place:

• The digit 3 appears in the unit's place for every set of ten numbers: 3, 13, 23, 33, 43, 53, 63, 73, 83, 93.
• This gives us 10 occurrences of the digit 3 in the units place.

Counting 3s in the tens place:

• The digit 3 appears in the tens place for the numbers from 30 to 39.
• This gives us 10 occurrences of the digit 3 in the tens place.

Adding these:

• 3s in units place: 10
• 3s in tens place: 10

In total, the digit 3 appears 20 times from 1 to 100.

SH18-8-2023