Question

Determinati cate numere de trei cifre, cu cifrele din multimea {1,2,3,4,5,6,7}, contin o singura cifra para.

Answer 1

123,125,127,134,136,143,145,147,161,141,121,112,132,231,235,237,341,345,347,312,314,316,321,325,327,413,415,417,431,435,437,451,453,457,521,523,525,527,512,514,516,532,534,536,541,543,545,547,552,554,556,561,563,565,567,572 ,
574,576,613,615,617,632,635,637,651,653,657,655,633,611,712,714,716,761,763,765,721,723,725,727,772,774,776,677,655,633,511,411,211.