[請益]計量一題
Carol’s age, in years, can be expressed by reversing the digits in her
father's age, in years. The sum of the digits in each age is 10.
(a) The positive difference between Carol’s age, in years, and her father’s age, in years
(b) 36
ans:(b)
我實在不懂...麻煩好心人解惑~thx~
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