Reasoning Ability - Calendar Problems
How many odd days are there in 2,500 years?
How many odd days are there in 2,500 years?
hard Q9 of 15
Step-by-Step Solution
Step 1: Break 2,500 = 400×6 + 100
Six 400-year cycles → 6×0 = 0 odd days.Step 2: Remaining 100 years
100 years = 5 odd days.Step 3: Reduce modulo 7
5 mod 7 = 5.Final Answer:
5 odd days → Option DQuick Check:
2500 = 2400+100 → only 100 contributes → 5 odd days.
Quick Trick: Always peel off 400-year cycles → they add 0 odd days.
Common Mistakes:
MISTAKES- Saying 25×100 → 125 odd days without mod 7 reduction.
Master "Calendar Problems" in Reasoning Ability
Start learning the concept with an interactive lesson.
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore Reasoning Ability Quizzes