Question

va rogg problemele care nu sunt taiate​

Answer 1

Răspuns:

47. a+b+c= 11  abc :7= d rest 0

119, 128, 137, 146, 155, 164, 173, 182, 191  ( 1+1+9= 1+2+8=1+3+7=11)

209, 218, 227, 236, 245, 254, 263, 272, 281, 290

308, 317, 326, 335, 344, 353, 362, 371, 380........

119= 17*7  182=26*7  245=35*7  308= 44*7  371= 53*7

434=62*7  560=80*7   623=89*7    812=116*7

48. a+b+c=9  b+c+d=17  le scadem si avem d-a=17-9=8

d=a+8  9=1+8    a= 1  d=9

b+c= 8  => b=1 c=7, b=2 c=6, b=3 c=5, b=4, c=4

b=5 c=3 , b=6 c=2 , b=7 c=1  , b=0 c=8, b=8 c=0

abcd = 1089, 1179, 1269, 1359, 1449, 1539, 1629, 1719, 1809