Question

Ajutorrrrrrrrrrrrrrrrrrrrrrrrrrrrrr plssssss

Answer 1

a) a+b+c+16=b+c+14+15
a+16=29
a=13

b) notam patratalele libere cu litere, incepand de pe prima linie de sus - stanga, astfel:
16, d, e, 13
i, h, g, f
j, k, l, m
b, 15, 14, c

deci 16+h+l+c = 16+13+d+e
h+l+c= 13+d+e
13+g+k+b=13+16+d+e
g+k+b=16+d+e
adunam cele 2 relatii
h+l+c+g+k+b=29+2(d+e)
b+c=d+e
h+l+g+k+d+e=29+2(d+e)
h+l+g+k=29+d+e (suma liniei)

c) suma totala a patratului este
1+2+3+...+16=16*17:2=8*17=136
suma unei linii / coloane/diagonale este
136÷4=34
16+i+j+b=15+14+b+c
i+j=c+13
suma hasurata este
136-(i+j+b+29)=136-(c+13+b+29)
b+c=34-29=5
decibsuma hasurata =136-(5+13+29)=89