Each of C, D, E, F, S, T and U has an exam on a different day of a week starting from Monday and ending on Sunday of the same week. F has the exam on Friday. Only two people have their exams between T and F. Only four people have their exams between E and T. S has the exam immediately after U. D does not have the exam on Monday. How many people have their exams before D and after C?

Four

One

Two

Three

APEDIA

NTPC Graduate Tier 1

2025 • 05 Jun, 2025 • Shift-3

Each of C, D, E, F, S, T and U has an exam on a different day of a week starting from Monday and ending on Sunday of the same week. F has the exam on Friday. Only two people have their exams between T and F. Only four people have their exams between E and T. S has the exam immediately after U. D does not have the exam on Monday. How many people have their exams before D and after C?

Correct Answer

Four

[Framework Setup]: Establish the sequence of days from Monday to Sunday. [Direct Placements]: The first solid clue is 'F has the exam on Friday'. Next, 'Only tw......

💡 Analysis & Explanation

[Framework Setup] ▼

Establish the sequence of days from Monday to Sunday.

[Direct Placements] ▼

The first solid clue is 'F has the exam on Friday'. Next, 'Only two people have exams between T and F'. Counting backwards from Friday, the only fit for T is Tuesday (Wed and Thu being the two days between).

[Long Gap Logic] ▼

'Only four people have exams between E and T'. Since T is on Tuesday, we count four days forward (Wed, Thu, Fri, Sat) placing E firmly on Sunday.

[Adjacency Rule] ▼

'S has the exam immediately after U'. We need two consecutive empty days. The only available consecutive slots are Wednesday and Thursday. Therefore, U is on Wednesday and S is on Thursday.

[Final Slotting] ▼

The remaining days are Monday and Saturday. The remaining people are C and D. The clue 'D does not have the exam on Monday' forces D to be on Saturday. Consequently, C must be on Monday.

[Complete Schedule] ▼

Mon(C), Tue(T), Wed(U), Thu(S), Fri(F), Sat(D), Sun(E).

[Question Resolution] ▼

The question asks for the number of exams scheduled between C (Monday) and D (Saturday). The exams are on Tue, Wed, Thu, and Fri.

Conclusion ▼

There are exactly four exams scheduled between them.

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