A little boy is numbering his collection of flowers by placing single-digit stickers under each specimen. If the boy has 100 flowers, how many stickers does he need? (The numbers are consecutive and the number of the first flower is 1).
Options: A) 152 B) 189 C) 192 D) 195 E) 203
For the first 9 flowers we need 9 stickers.   For the next 90 we need 2 stickers each or 180 stickers.   For the next 900 flowers we need 3 stickers each.   The first 99 flowers correspond to 189 stickers.   Subtract 99 from the total number of flowers (100).   This leaves 1 flower that uses 3 stickers each. So, multiply 1 by 3 to get 3.   Add 3 to 189 stickers to get 192 stickers.   Answer: 192
<result>C</result>
A little boy is numbering his collection of flowers by placing single-digit stickers under each specimen. If the boy has 100 flowers, how many stickers does he need? (The numbers are consecutive and the number of the first flower is 1).