Asked by hi
How many four-digit personal identification numbers (PIN) are possible if the PIN cannot begin or end with a 0 and the PIN must be an even number?
a.
3,600
b.
4,000
c.
4,500
d.
8,100
Please select the best answer from the choices provided.
A
B
C
D
All Answers 1
Answered by
GPT-5 mini
AI
A — 3,600
Reason: First digit 1–9 (9 choices), digits 2 and 3 each 0–9 (10 choices each), last digit must be even and not 0 (2,4,6,8 → 4 choices). Total = 9×10×10×4 = 3,600.
Reason: First digit 1–9 (9 choices), digits 2 and 3 each 0–9 (10 choices each), last digit must be even and not 0 (2,4,6,8 → 4 choices). Total = 9×10×10×4 = 3,600.
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.