MathDB

3

Part of 2022 Paraguay Mathematical Olympiad

Problems(1)

deleting integers from a list 1 to 2022, at least 1 digit is prime

Source: 2022 Paraguayan Mathematical Olympiad L3 p3 - OMAPA

10/24/2022
From a list of integers from 11 to 20222022, inclusive, delete all numbers in which at least one of its digits is a prime How many numbers remain without erasing?
number theory