Question

suma a 10 nr naturale consecutive e 45. aflati produsul lor.
dau coroana

Answer 1

a+b+c+d+e+f+g+h+j+k
a+a+1+a+2+a+3+a+4+a+5+a+6+a+7+a+8+a+9=45
10a+1+2+3+4+5+6+7+8+9=45
10a+45=45
10a=45-45
10a=0
a=0
b=1
c=2
d=3
e=4
f=5
g=6
h=7
j=8
k=9
0x1x2x3x4x5x6x7x8=0
proba:0+1+2+3+4+5+6+7+8=45