A 110-year-old great-great-grandmother is tickling funny bones with a hilarious response to learning her age on her birthday. Ruth Fear of Washington state, born in 1911, has survived two world wars, the Great Depression, and now a global pandemic. She celebrated her birthday in December last year among family and friends. Despite knowing it was her special day, the supercentenarian had no idea quite how many decades she had amassed. In the sweet footage filmed by Ruth’s granddaughter, 47-year-old Teri Trayan, Ruth clarifies, “You get older on your birthday?” Teri tells the birthday girl, “Yes, how old are you?” to which Ruth replies, “I have no idea.” When Teri breaks the news that her grandmother is 110 years old, Ruth is incredulous. She needs her granddaughter to repeat the number, twice, before finally exclaiming, “I don’t believe that!” with a shake of her head. Teri counters, “You look like you’re …