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Each of Q, R, W, T, E, U and Y has an exam on a different day of a week, starting from Monday and ending on Sunday of the same week. T has an exam on Wednesday. Exactly three people have an exam between T and U. Q has an exam immediately after E and W has an exam immediately before E. Only three people have an exam between R and E. Who has an exam immediately after Y?
T
Q
R
U Question ID : 4410091462375 Option 1 ID : 4410095777613 Option 2 ID : 4410095777612 Option 3 ID : 4410095777611 Option 4 ID : 4410095777610 Status : Answered Chosen Option : C
T
Fix the anchor point (Wednesday) and use the 'W-E-Q' block constraint as a single unit to rapidly eliminate positions.
Fix the anchor point (Wednesday) and use the 'W-E-Q' block constraint as a single unit to rapidly eliminate positions.
Fixing the anchor points
T is on Wednesday. Since 3 people are between T and U, U must be on Sunday (Wednesday + 4 days) or Sunday (Wednesday - 4 days which is not possible). So, T=Wed, U=Sun.
Placing the block
We are given the sequence W-E-Q (W immediately before E, Q immediately after E). We have 5 slots left (Mon, Tue, Thu, Fri, Sat). Placing W-E-Q in Mon-Tue-Wed is impossible (Wed is T). Placing it in Thu-Fri-Sat gives: Thu=W, Fri=E, Sat=Q.
Final placement verification
The remaining person is R. The constraint '3 people between R and E' implies: if E is Fri, 3 people between them means R is Mon (Counting 3 spots: Sat, Sun, Mon? No, check: E=Fri, gap of 3 means R is Tue or Mon). If R is Mon, gaps are Tue, Wed, Thu. Correct. Layout: Mon=R, Tue=Y, Wed=T, Thu=W, Fri=E, Sat=Q, Sun=U.
A: T is on Wednesday, Y is on Tuesday, so T is after Y but not immediately; B: Q is on Saturday, which is not after Y; C: R is on Monday, not after Y; D: U is on Sunday, not after Y. Wait, re-evaluating: After Y (Tuesday) is T (Wednesday). So A is correct.
A is correct because based on the sequence R(Mon), Y(Tue), T(Wed), W(Thu), E(Fri), Q(Sat), U(Sun), T is the person who has an exam immediately after Y.
In scheduling puzzles, always prioritize the item with the most constraints (like the W-E-Q block) after placing the fixed anchor point.
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