Question

abcdefg x 3 = bcdefga abcdefg 各是多少

Answer 1

设a为X,bcdefg为Y,

则abcdefg=1000000X+Y

bcdefga=10Y+X

(1000000X+Y)*3=10Y+X

3000000X+3Y=10Y+X

2999999X=7Y

29999999和7互为质数

所以X得7

但是a=X=7时

abcdefg x 3 要进一位

这题无解