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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?

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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3 votes
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?

asked
User Caylin
by
7.4k points

1 Answer

4 votes

Answer:

72

Calculate one by one:

9P2

answered
User Dmitry Ionash
by
7.7k points
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