how many positive whole numbers smaller than 2003 have 2 as their first digit and 1 as their last digit
1-digit: none
2-digit: 1 (21)
3-digit: 10 (201 ,,, 291)
4-digit: 1 (2001)
So, 12 in all.
2-digit: 1 (21)
3-digit: 10 (201 ,,, 291)
4-digit: 1 (2001)
So, 12 in all.