How many 2 are there in 1 to 100?

Let's break this down! We need to count how many times the digit '2' appears from 1 to 100.

• From 1-9: Just the number 2. So, 1 time.
• From 10-19: The number 12. So, 1 time.
• From 20-29: Here, every number starts with 2 (20, 21, 22, 23... 29). That's 10 numbers for the tens digit. Plus, 22 has an extra 2 in the units place. So, 10 (from the 20s) + 1 (the second 2 in 22) = 11 in this range alone.
• From 30-39, 40-49, ... 90-99: Each of these decades has one number with a '2' in the units place (32, 42, 52, ..., 92). That's 8 more times.

Now, let's add them up: 1 (from 1-9) + 1 (10-19) + 11 (20-29) + 8 (30-99) = 21 times.

But wait, we haven't done 100. 100 has no '2'. So, the final answer is 20.

Tricky, right? The 20s group is what throws people off!