Zara has forgotten her 4-digit PIN code. She knows the first digit is a factor of 20 and the 4 digits make a number divisible by 2. How many different sets of 4 digits could it be? - QAmmunity.org

Zara has forgotten her 4-digit PIN code. She knows the first digit is a factor of 20 and the 4 digits make a number divisible by 2. How many different sets of 4 digits could it be?

asked Sep 19, 2021 70.0k views

1 Answer

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