An octogenarian is a person who is between the ages of 80 to 89. A nonagenarian is a person who is between the ages of 90 to 99.
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A Person Between The Ages Of Eighty And Ninety Is Called an Octogenarian. (:
(80 + 90) / 2 = 85Therefore, the number between 80 and 90 is 85.
Halfway between 30 and 80 is (30 + 80) ÷ 2 = 55.
The halfway point between 70 and 80 is (70 + 80) ÷ 2 = 75
80 < 22n < 85