Question

A new hotel has 32 rooms on the second floor. The rooms will be numbered 201 to 232. The manager wants to put brass numerals on the door of each room. How many 2s will be needed?

Answer 1

4

Answer 2

In the hundreds placing, since the number starts from 201 to 232, you already need 32.

from 01 to 32, just count manually, 02, 12, 20, 21, 22(double),23,24,25,26,27,28,29,32

So added tgt, 14 +32 = 46