How many days after the purchase of Product X does its standard warranty expire?
(1997 is not a leap year.)
(1) When Mark purchased Product X in January 1997, the warranty did not expire
until March 1997.
(2) When Santos purchased Product X in May 1997, the warranty expired in May
1997.
Solution : Rephrase the two statements in terms of extreme possibilities:
(1) Shortest possible warranty period: Jan. 31 to Mar. 1 (29 days later)
Longest possible warranty period: Jan. 1 to Mar. 31 (89 days later)
Note that 1997 was not a leap year.
(2) Shortest possible warranty period: May 1 to May 2, or similar (1 day later)
Longest possible warranty period: May 1 to May 31 (30 days later)
Even taking both statements together, there are still two possibilities—29 days and 30 days —so both
statements together are still insufficient.
I don't understand why are we considering Shortest period from 1st statement and Longest period from 2nd statement?
How do we derive warranty period from above extreme scenarios ?
(1997 is not a leap year.)
(1) When Mark purchased Product X in January 1997, the warranty did not expire
until March 1997.
(2) When Santos purchased Product X in May 1997, the warranty expired in May
1997.
Solution : Rephrase the two statements in terms of extreme possibilities:
(1) Shortest possible warranty period: Jan. 31 to Mar. 1 (29 days later)
Longest possible warranty period: Jan. 1 to Mar. 31 (89 days later)
Note that 1997 was not a leap year.
(2) Shortest possible warranty period: May 1 to May 2, or similar (1 day later)
Longest possible warranty period: May 1 to May 31 (30 days later)
Even taking both statements together, there are still two possibilities—29 days and 30 days —so both
statements together are still insufficient.
I don't understand why are we considering Shortest period from 1st statement and Longest period from 2nd statement?
How do we derive warranty period from above extreme scenarios ?
