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lilgiantsman lilgiantsman
  • 03-05-2015
  • Mathematics
Answered

On January 1st, Jerome concocts a rumor and tells Beth. On January 2nd, they each tell a new person. By the end of January 2nd, four people have heard the rumor. On each subsequent day, each person who has heard the rumor spreads it to a new person.


How many people have heard the rumor by the end of January 8th?

Verified Answer :

AL2006
AL2006 AL2006
  • 03-05-2015

If we call 'D' the date in January, then at the end of D, there arr. 2^D people who have heard the rumor.
2^8 = 256 .

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