Let's say the number is 57.
You take the first digit, 5, and add a zero to the end of it.
So you have 50.
Then you take the second digit, 7, which stays the same.
Therefore you have fifty (50) - seven (7).
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There are 21 two-digit prime numbers.
The only two numbers that represent a binary digit are 0 and 1
7 two-digit numbers.
The set of two-digit number
The two 3 digit numbers are: 170 and 819 -Huy Dien