13. Câte numere naturale de trei cifre au ultima
cifră pară?
A) 900
B) 90
C) 450
D) 100
Răspunsuri la întrebare
Răspuns:
ultima cifra 0:
100, 110, 120, 130, 140, 150, 160, 170, 180, 190, 200.210, 220, 230,240 250,260,270,280,290 ,300,310,320,330,340,350,360,370,380,390,400,410,420,430,440,450,460,470,480,490,500,510,520,530,540,550,560,570,580,590,600,610,620,630,640,650,660,670,680,690,700,710,720,730,740,750,760,770,780,790,800,810,820,830,840,850,860,870,880,890,950, 960, 970, 980, 990.
ultima cifra 2:
102, 112, 122, 132, 142, 152, 162, 172, 182, 192, 202, 212, 222, 232, 242.....................912, 922, 932, 942, 952, 962, 972, 982, 992.
ultima cifra 4:
104, 114, 124, 134, 144, 154, 164, 174, 184, 194, 204.........................954, 964, 974, 984, 994.
ultima cifra 6:
106, 116, 126, 136, 146, 156 ,166, 176, 186, 196, 206..........................956, 966, 976, 986, 996.
ultima cifra 8:
108, 118, 128, 138, 148, 158, 168, 178, 188, 198, 208.............................958, 968, 978, 988, 998.
C) 450
Explicație pas cu pas: