3. Write the number 100000 as a product of two natural numbers whose notation does not contain the digit 0.
3. $100000=2 \cdot 2 \cdot 2 \cdot 2 \cdot 2 \cdot 5 \cdot 5 \cdot 5 \cdot 5 \cdot 5$. 2 points

Since the number 100000 needs to be represented as the product of two numbers that do not contain the digit 0 in either number, the factors 2 and 5 must not be together, so the solution to the problem is

$(2 \cdot 2 \cdot 2 \cdot 2 \cdot 2) \cdot(5 \cdot 5 \cdot 5 \cdot 5 \cdot 5)=32 \cdot 3125$.

2 points

.$T O T A L 4$ POINTS