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0 / 60 seg.
A book has 500 pages: The 1st page says "Exactly 1 page in this book is false." The 2nd page says "Exactly 2 pages in this book are false." ... The 500th page says "Exactly 500 pages in this book are false." Can any of the pages be true?
Y
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9
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C
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4
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N
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B
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K
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"
W
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,
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Clue
YES, THE 499TH PAGE IS TRUE. IT SAYS "EXACTLY 499 PAGES IN THIS BOOK ARE FALSE." WITH THIS PAGE TRUE, THE OTHER 499 PAGES ARE FALSE, FULFILLING THE STATEMENT
THE BOOK COSTS $2. LET THE COST BE X. WE KNOW THAT: X = 1 + X/2 SOLVING FOR X WILL GIVE 2
SHE WAS BORN ON FEBRUARY 29, 1896. THE YEAR 1900 WAS NOT A LEAP YEAR (ONLY CENTURIES DIVISIBLE BY 400 ARE LEAP YEARS), SO THE NEXT FEBRUARY 29 FELL IN 1904 WHEN SHE WAS EIGHT. SHE WAS TWELVE ON HER SECOND BIRTHDAY
THE WOMAN MADE A PROFIT OF $20. SHE MADE $10 (BOUGHT AT $60, SOLD AT $70) WHEN SHE SOLD THE ITEM FOR THE FIRST TIME AND ANOTHER $10 (BOUGHT AT $80, SOLD AT $90) WHEN SHE SOLD IT FOR THE SECOND TIME
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