Ask Question
29 August, 08:07

To number the apartments in a building, metal plates with digits were used: one digit on each plate. How many plates were used to number 136 apartments in the building?

+2
Answers (1)
  1. 29 August, 09:35
    0
    301 plates

    Step-by-step explanation:

    For numbers between 0 and 9, 1 plate was used each.

    This means that 10 plates were used.

    For numbers between 10 and 99, 2 plates were used for each.

    This means that the number of plates used will be:

    2 * 90 = 180 plates

    For numbers between 100 and 136, 3 plates were used for each.

    This means that the number of plates used is:

    3 * 37 = 111 plates

    The total number of plates used is therefore:

    10 + 180 + 111 = 301 plates

    301 plates were used in total.
Know the Answer?