UPSC CAPF Assistant Commandant Model Paper 5

Given:
We need to find product of 3 × 5 × 7 × 11 × 13 × …
Concept used:
When we multiply any odd number by 5, then last digit/unit digit of that number will be always 5.
Calculation:
Thus, last digit/unit digit of the product of all prime numbers great than 2 and less than 1330 = 5