Question

Great-Grandma celebrated her eighty-fourth birthday in 2002. In what year was she born?

Answer 1

Celebration of 84 birthday = 2002

Year in which she was born = 2002 - 84

=1918

Therefore Great-Grandma was born on the year 1918

Answer 2

1918

Explanation:

Great-Grandma celebrated her eighty-fourth birthday in 2002. In what year was she born?

2002 - 84 years = 1918

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This follows the same principal as you subtracting your age from the current year to find the year in which you were born.