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One time must be used
Two possible arrangements can share a useful fact.
Deduction: Pseudo-true pair (staggered)
GUIDED WALKTHROUGHStep 1 of 3
One time must be used
Each person has a different drink and snack. These small examples show one idea at a time; some squares will stay empty.
| Drinks | Snacks | Arrival times | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Tea | Coffee | Juice | Cocoa | Apple | Crackers | Brownie | Pear | 9:00 | 10:00 | 11:00 | 12:00 | ||
| People | Ada | ||||||||||||
| Ben | |||||||||||||
| Cy | |||||||||||||
| Dee | |||||||||||||
| Arrival times | 9:00 | ||||||||||||
| 10:00 | |||||||||||||
| 11:00 | |||||||||||||
| 12:00 | |||||||||||||
| Snacks | Apple | ||||||||||||
| Crackers | |||||||||||||
| Brownie | |||||||||||||
| Pear | |||||||||||||
Look here This step✓ Match× Not a match
The clues
- Ada arrived at 9:00 or 10:00.
- Ben arrived at 10:00 or 11:00.
- Ben arrived one hour after Ada.
STEP 1
Keep the allowed times
Ada can have 9:00 or 10:00. Ben can have 10:00 or 11:00. Cross out their other times.