Răspuns :
100a+10b+c+100b+10c+a+100c+10a+b=
=111a+111b+111c
=111(a+b+c)
=3·37(a+b+c) | 37
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=111a+111b+111c
=111(a+b+c)
=3·37(a+b+c) | 37
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100a+10b+c+100b+10c+a+100c+10a+b=111a+111b+111c=111(a+b+c)=37×3×(a+b+c) rezulta ca este divizibil cu 37