If you write down all the numbers from 1 to 100, then how many times do you write 3?
- 3,13,23 (3 units)
- 30,31,32,33,…,39 (11 units)
- 43,53,63,73,83,93 (6 units)
Total: 3 units+11 units+6 units=20 units
Answer: 20
If you write down all the numbers from 1 to 100, then how many times do you write 3?
Total: 3 units+11 units+6 units=20 units
Answer: 20