Civil Services Examination · ప్రశ్న 20
What is the unit digit in the multiplication of 1 × 3 × 5 × 7 × 9 × ... × 999?
సమాధానం చూపించు & వివరణ
సమాధానం: (C) 5
వివరణ
The product of odd numbers including 5 ends in 5. (Answer as per the official UPSC answer key.)