878 is?321?
回答 (1)
a321a為878的整數倍求a
Sol
a321a
=10000a+3210+a
=10001a+3210
=9658a+343a+2634+576
=9658a+2634+343a+576
=878*(11a+3)+343a+576
a為偶數
(1) a=2
343a+576=1562=878+684 (不合)
(2) a=4
343a+576=1948=2*878+192 (不合)
(3) a=6
343a+576=2634=3*878
(4) a=8
343a+576=3320=3*878+686 (不合)
So
a=6
收錄日期: 2021-04-30 22:40:41
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20180109133602AA45cAr
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