Comprehension
Read the information given below to answer the questions.
(i) Mohan‘s reading schedule consists of reading only subject on a given day of the week.
(ii) The subjects are Physics, Chemistry, Mathematics, Biology, and Social Science.
(iii) Monday to Saturday are reading days including one day only for play. Sunday is a complete holiday for Mohan.
(iv) Mathematics day is neither on the first day nor on the last day but earlier than the Chemistry day.
(v) Biology day is on the immediate next day of Chemistry day.
(vi) Physics day is on the immediate previous day of the play day.
(vii) Biology day and Social Science day have a gap of two days between them.
(viii) Social Science day is on the immediate next day of the play day.
Question: 1
Which of the following day is the play day?
Which of the following day is the play day?
Show Hint
When constraints create a fixed three-day block (like Phy–Play–SS), try each candidate day and eliminate by conflicts with “immediate next/previous”, “two-day gap”, and “first/last” conditions.
Updated On: Aug 14, 2025
- Monday
- Tuesday
- Wednesday
- Thursday
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The Correct Option is B
Solution and Explanation
Step 1: Chain around the Play day
From (iv) and (v): the three consecutive days must be Physics — Play — Social Science (Phy/Play/SS in order). This triple must fit inside Mon–Sat without touching Sunday.
Step 2: Test each option for the Play day
[-2mm]
Play = Monday: Then Phy would be Sunday (not allowed; Sunday is a holiday). Reject.
Play = Tuesday: Then Phy = Monday, SS = Wednesday. This fits the week. Keep as a candidate.
Play = Wednesday: Then Phy = Tuesday, SS = Thursday. From (vi), SS and Bio must be three days apart (two days in between), so Bio would have to be \underline{Sunday or Monday}. Sunday is a holiday; Monday Bio forces Chem on Sunday (since Bio is the day after Chem), impossible. Reject.
Play = Thursday: Then Phy = Wednesday, SS = Friday. From (vi), SS (Fri) three apart gives Bio = \underline{Tuesday or Monday}.
If Bio = Tuesday, then Chem = Monday. But (ii) demands Math earlier than Chem and not first/last; earlier than Monday is impossible. Reject.
If Bio = Monday, Chem = Sunday (holiday). Reject.
Play = Friday/Saturday: SS would be Saturday/Sunday respectively; Saturday case leaves no room for the two-day gap with SS and the Chem–Bio adjacency, and Sunday is a holiday. Reject. Step 3: Complete the schedule for the valid case (Play = Tuesday)
We have: Mon = Phy, Tue = Play, Wed = SS. From (vi), SS (Wed) and Bio must be three days apart, so Bio = Saturday. Then from (iii) Chem must be the day before Bio, i.e., Friday. By (ii), Math is earlier than Chem and neither first nor last, so Thursday suits Math. Final layout (Mon–Sat): Phy, Play, SS, Math, Chem, Bio — all conditions satisfied.
Conclusion: The only consistent placement is Play on Tuesday.
From (iv) and (v): the three consecutive days must be Physics — Play — Social Science (Phy/Play/SS in order). This triple must fit inside Mon–Sat without touching Sunday.
Step 2: Test each option for the Play day
[-2mm]
Play = Monday: Then Phy would be Sunday (not allowed; Sunday is a holiday). Reject.
Play = Tuesday: Then Phy = Monday, SS = Wednesday. This fits the week. Keep as a candidate.
Play = Wednesday: Then Phy = Tuesday, SS = Thursday. From (vi), SS and Bio must be three days apart (two days in between), so Bio would have to be \underline{Sunday or Monday}. Sunday is a holiday; Monday Bio forces Chem on Sunday (since Bio is the day after Chem), impossible. Reject.
Play = Thursday: Then Phy = Wednesday, SS = Friday. From (vi), SS (Fri) three apart gives Bio = \underline{Tuesday or Monday}.
If Bio = Tuesday, then Chem = Monday. But (ii) demands Math earlier than Chem and not first/last; earlier than Monday is impossible. Reject.
If Bio = Monday, Chem = Sunday (holiday). Reject.
Play = Friday/Saturday: SS would be Saturday/Sunday respectively; Saturday case leaves no room for the two-day gap with SS and the Chem–Bio adjacency, and Sunday is a holiday. Reject. Step 3: Complete the schedule for the valid case (Play = Tuesday)
We have: Mon = Phy, Tue = Play, Wed = SS. From (vi), SS (Wed) and Bio must be three days apart, so Bio = Saturday. Then from (iii) Chem must be the day before Bio, i.e., Friday. By (ii), Math is earlier than Chem and neither first nor last, so Thursday suits Math. Final layout (Mon–Sat): Phy, Play, SS, Math, Chem, Bio — all conditions satisfied.
Conclusion: The only consistent placement is Play on Tuesday.
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Question: 2
Physics day and Biology day have a gap of how many days between them?
Physics day and Biology day have a gap of how many days between them?
Show Hint
When asked for a “gap” in days, exclude both the starting and ending days—count only the days \emph{in between}.
Updated On: Aug 14, 2025
- One
- Two
- Three
- Four
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The Correct Option is D
Solution and Explanation
From Q181’s completed schedule:
Mon = Physics, Tue = Play, Wed = Social Science, Thu = Mathematics, Fri = Chemistry, Sat = Biology.
Step 1: Identify positions
Physics = Monday (Day 1), Biology = Saturday (Day 6). Step 2: Count the gap days in between
Between Monday and Saturday: Tue, Wed, Thu, Fri = 4 days gap. Step 3: Verify no wrap-around
We only count within the same week’s schedule (Mon–Sat), so no circular count is needed.
Physics = Monday (Day 1), Biology = Saturday (Day 6). Step 2: Count the gap days in between
Between Monday and Saturday: Tue, Wed, Thu, Fri = 4 days gap. Step 3: Verify no wrap-around
We only count within the same week’s schedule (Mon–Sat), so no circular count is needed.
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Question: 3
Which day is Social Science day?
Which day is Social Science day?
Show Hint
When a problem gives “immediate previous/next” for two different subjects centered on the same day, lock that 3-day block first and then test days to eliminate contradictions.
Updated On: Aug 14, 2025
- Monday
- Tuesday
- Wednesday
- Thursday
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The Correct Option is C
Solution and Explanation
Rebuild the fixed blocks from the rules
From the instructions:
(i) One day is Play; the rest (Mon–Sat) are single-subject days; Sunday is a holiday.
(ii) Physics is on the immediate previous day of Play.
(iii) Social Science is on the immediate next day of Play.
Hence, the three consecutive days must be Physics — Play — Social Science.
Eliminate impossible placements for Play
Play cannot be Monday (would force Physics on Sunday, a holiday).
Play cannot be Wednesday if we also respect: Biology and Social Science have a two-day gap between them, and Biology is the day after Chemistry; this creates a contradiction with Sunday.
Play cannot be Thursday (gives contradictions with Mathematics being earlier than Chemistry and not first/last).
The only consistent position is Play = Tuesday. Therefore, Physics = Monday and Social Science = Wednesday.
Complete the week to cross-check
With SS on Wednesday, the two-day gap to Biology puts Biology = Saturday, so Chemistry = Friday (Bio is immediately after Chem). Mathematics is earlier than Chemistry and not first/last, so Mathematics = Thursday.
Final arrangement: Mon–Sat = Physics, Play, Social Science, Mathematics, Chemistry, Biology. All rules fit.
Thus, Social Science day is Wednesday.
From the instructions:
(i) One day is Play; the rest (Mon–Sat) are single-subject days; Sunday is a holiday.
(ii) Physics is on the immediate previous day of Play.
(iii) Social Science is on the immediate next day of Play.
Hence, the three consecutive days must be Physics — Play — Social Science.
Eliminate impossible placements for Play
Play cannot be Monday (would force Physics on Sunday, a holiday).
Play cannot be Wednesday if we also respect: Biology and Social Science have a two-day gap between them, and Biology is the day after Chemistry; this creates a contradiction with Sunday.
Play cannot be Thursday (gives contradictions with Mathematics being earlier than Chemistry and not first/last).
The only consistent position is Play = Tuesday. Therefore, Physics = Monday and Social Science = Wednesday.
Complete the week to cross-check
With SS on Wednesday, the two-day gap to Biology puts Biology = Saturday, so Chemistry = Friday (Bio is immediately after Chem). Mathematics is earlier than Chemistry and not first/last, so Mathematics = Thursday.
Final arrangement: Mon–Sat = Physics, Play, Social Science, Mathematics, Chemistry, Biology. All rules fit.
Thus, Social Science day is Wednesday.
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Question: 4
Which day is Mathematics day?
Which day is Mathematics day?
Show Hint
After placing the rigid blocks, apply “relative ordering” constraints (earlier than/later than) to anchor the remaining subjects.
Updated On: Aug 14, 2025
- Monday
- Tuesday
- Wednesday
- Thursday
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The Correct Option is D
Solution and Explanation
Use the established sequence
From Q183’s reconstruction: Mon–Sat = Physics, Play, Social Science, \underline{Mathematics}, Chemistry, Biology.
Why must Mathematics be Thursday?
Rule: “Mathematics is neither on the first nor the last day but earlier than Chemistry.”
In the arrangement above, Chemistry is Friday; the only remaining day earlier than Friday that is not first/last and not already occupied by Physics/Play/SS is Thursday.
Therefore, Mathematics day is Thursday.
From Q183’s reconstruction: Mon–Sat = Physics, Play, Social Science, \underline{Mathematics}, Chemistry, Biology.
Why must Mathematics be Thursday?
Rule: “Mathematics is neither on the first nor the last day but earlier than Chemistry.”
In the arrangement above, Chemistry is Friday; the only remaining day earlier than Friday that is not first/last and not already occupied by Physics/Play/SS is Thursday.
Therefore, Mathematics day is Thursday.
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Question: 5
Which of the following is the correct statement?
Which of the following is the correct statement?
Show Hint
When options are declarative, verify each against the completed schedule rather than relying on memory—this prevents day-position slips.
Updated On: Aug 14, 2025
- Biology day is after Chemistry day
- Physics day is on Wednesday
- Play day is on Monday
- Chemistry day is earlier than Physics day
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The Correct Option is A
Solution and Explanation
Reference arrangement (validated in Q183):
Mon–Sat = Physics, Play, Social Science, Mathematics, Chemistry, Biology.
Check each option explicitly
(A) True: Biology (Saturday) is indeed after Chemistry (Friday).
(B) False: Physics is Monday, not Wednesday.
(C) False: Play is Tuesday, not Monday.
(D) False: Chemistry (Friday) is later than Physics (Monday), not earlier.
Therefore, only (A) is correct.
Mon–Sat = Physics, Play, Social Science, Mathematics, Chemistry, Biology.
Check each option explicitly
(A) True: Biology (Saturday) is indeed after Chemistry (Friday).
(B) False: Physics is Monday, not Wednesday.
(C) False: Play is Tuesday, not Monday.
(D) False: Chemistry (Friday) is later than Physics (Monday), not earlier.
Therefore, only (A) is correct.
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