Question

cate numere naturale de trei cifre exista,astfel incat suma dintre prima si ultima cifra sa fie 10?

Answer 1

Răspuns:

90

Explicație pas cu pas:

109,208,307,406,505,604,703,802,901

119,218,317,416,515,614,713,812,911

129,228,327,426,525,624,723,822,921

139,238,337,436,535,634,733,832,931

149,248,347,446,545,644,743,842,941

159,258,357,456,555,654,753,852,951

169,268,367,466,565,664,763,862,961

179,278,377,476,575,674,773,872,971

189,288,387,486,585,684,783,882,981

199,298,397,496,595,694,793,892,991

10x9=90 numere