In a school there are 7 subjects in class Xth. Each subject is taught on seven…
2024
In a school there are 7 subjects in class Xth. Each subject is taught on seven different days of the week. The subjects are English, Hindi, Maths, Biology, History, Geography, and Chemistry. English class is held on Sunday. Hindi class is held after maths and biology class. History, Geography and Chemistry class is held on consecutive days, however not in same order. The Maths class can be held latest by?
- A.
Monday
- B.
Thursday
- C.
Friday
- D.
Wednesday
Attempted by 11 students.
Show answer & explanation
Correct answer: C
Key facts: English is on Sunday; History, Geography, and Chemistry occupy three consecutive days; Hindi must be scheduled after both Maths and Biology.
Place English on Sunday.
The three consecutive subjects (History, Geography, Chemistry) should be placed together on any three consecutive days among the remaining days.
Hindi must come after both Maths and Biology, so Hindi must be scheduled later than both of those subjects.
To make Maths as late as possible, put the consecutive block early and place Hindi on the latest available day so Maths can be the day immediately before Hindi.
Example valid arrangement that maximizes Maths:
Sunday: English
Monday–Wednesday: History, Geography, Chemistry (in any order)
Thursday: Biology
Friday: Maths
Saturday: Hindi
Conclusion: Therefore, Maths can be held at the latest on Friday.