How many months old was?
Jen gave birth to her daughter Caroline on the first of January in a year following a leap year. Starting in February, on the first of the month throughout that year, she made note of the day of the week. She noticed that the monthly anniversary of her daughter’s birth fell on a Friday three times that year. On what day of the week was Caroline born? And how many months old was Caroline before her monthly “‘birthday” fell on its original day for the third time (not counting her actual day of birth).
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Caroline was born on a Tuesday. She was 18 months old when her birthday fell on a Tuesday for the third time, in her second July.
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