Problem 5 (Insect-Plague Problem)

An archeologist has deciphered an old scroll that says an ancient people suffered from 7 plagues of locusts that occured at 8 year intervals. The scroll also said that after the 7th plague, the sum of the years when the plagues occured was 420. The scroll didn't give the years of the plagues and so the archrologist never knew the exact dates. Can you tell the archeologist when the 13 plagues occured ?

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Last modified on Tuesday, January 12, 1999