Question

Rena wrote all integers 1 to 12. How many digits did she write

Answer 1

Rena wrote 15 digits.

Explanation:

Starting with 10, you start adding 2 for every 2 digit number, so for 10, 11, and 12 you add 6 all together. 9+6= 15.

Answer 2

Rena wrote 15 digits