How many odd days are there in 200 years (no century in between is divisible by 400)?

1. In 100 years (not divisible by 400): 76 ordinary + 24 leap = 76·365 + 24·366 days. 2. Total days in 100 years = 36524. 36524 mod 7 = 5. So 100 years has 5 odd days. 3. 200 years (also not div by 400) → 10 odd days → 10 mod 7 = 3 odd days. _Source: TSICET 2024 PYQ Q.53 (Shift 1, Calendar)_