Question
Download Solution PDFEach of O, P, Q, R, 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. S has an exam on Wednesday. R has an exam on one of the days after P and T has an exam on one of the days before Q. U has an exam immediately after O and S has an exam immediately before O. T has an exam on one of the days after U. How many people have an exam between S and Q?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFGiven: Each of O, P, Q, R, 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.
There are 7 days in a week and 7 people, so each person has an exam on one day.
1) S has an exam on Wednesday.
| Day | Person |
| Monday | |
| Tuesday | |
| Wednesday | S |
| Thursday | |
| Friday | |
| Saturday | |
| Sunday |
2) U has an exam immediately after O and S has an exam immediately before O.
This means the sequence is S - O - U. Since S is on Wednesday, O must be on Thursday, and U must be on Friday.
| Day | Person |
| Monday | |
| Tuesday | |
| Wednesday | S |
| Thursday | O |
| Friday | U |
| Saturday | |
| Sunday |
3) T has an exam on one of the days after U.
| Day | Person |
| Monday | |
| Tuesday | |
| Wednesday | S |
| Thursday | O |
| Friday | U |
| Saturday | T |
| Sunday |
4) T has an exam on one of the days before Q.
| Day | Person |
| Monday | |
| Tuesday | |
| Wednesday | S |
| Thursday | O |
| Friday | U |
| Saturday | T |
| Sunday | Q |
5) R has an exam on one of the days after P.
| Day | Person |
| Monday | P |
| Tuesday | R |
| Wednesday | S |
| Thursday | O |
| Friday | U |
| Saturday | T |
| Sunday | Q |
There are 3 people have an exam between S and Q
Hence, the correct answer is "Option 3".
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