Question

Calculati cat mai rapid suma tuturor numerelor naturale impare cel putin egale cu 9 si cel mult egale cu 29

Answer 1

Răspuns:

9+11+13+15+17+19+21+23+25+27+29=

20+13+15+17+19+21+23+25+27+29=

33+15+17+19+21+23+25+27+29=

48+17+19+21+23+25+27+29=

65+19+21+23+25+27+29=

84+21+23+25+27+29=

105+23+25+27+29=

128+25+27+29=

153+27+29=

190+29=219

răspuns final: 219