Question

intr-o ferma sunt in numar egal gaini,curci si cai. acestea au impreuna 280 de picioare. cate curci sunt? a) 43 b) 36 c) 28 d)35

Answer 1

43*2=86 86+86=172 172+86+86=peste 36*2=72 72*2=144 144+72+72=peste 28*2=56 56+56=112 112+56+56=peste 35*2=70 70*2=140 140+70+70=280