Q: By the end of the 9th day of the 9th month (i.e. 9th September), the 252nd day of the year, how many minutes had passed this year?
A: 9!
= 252 days
= 9×28 days
= 9×28×24 hours
= 9×28×24×60 minutes
= 9×(7×4)×(8×3)×(6×5×2) minutes
= 9×8×7×6×5×4×3×2 minutes
= 9! minutes
ekoshapu 
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