joym28265 joym28265

10-04-2021
Mathematics

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Alan has forgotten his 4-digit PIN code. He knows the first digit is odd, and the last digit is a 5. How many different sets of 4 digits could it be?

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HaikalMegat HaikalMegat

10-04-2021

Answer:

72

Calculate one by one:

9P2

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