Seudónimo Seudónimo

22-07-2020
Mathematics

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How many times will the digit '3' appear if we write a all whole numbers from 1 to 99?

Respuesta :

22-07-2020

Answer:

20

Step-by-step explanation:

The number 3 will appear in the numbers 3, 13, 23, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 43, 53, 63, 73, 83, 93. In these numbers it appears 20 times.

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