[計量] 一題數學
The two digit intergers N and N' are positive and have the same digits,
but in reversed ordered. How many intergers N are there if the sum of N
and N' is a perfect square?
ANS:8
我怎麼算都只有算到兩種
麻煩知道的人跟我說一下
謝謝你=)
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06/21 18:43, , 1F
06/21 18:43, 1F
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