5) Quantos números distintos com 3 algarismos diferentes, podemos formar com os digitos:
0,1,2,4,7,8 e 9.
Soluções para a tarefa
Resposta: É possível escrever 180 números.
Explicação passo-a-passo:
102,104,107,108,109,120,124,127,128,129,140,142,147,148,149,170,172,174,178,179,180,182,184,187,189,190,192,194,197,198,201,204,207,208,209,210,214,217,218,219,240,241,247,248,249,270,271,274,278,279,280,281,284,287,289,290291,294,297,298,401,402,407,408,409,410,412,417,418,419,420,421,427,428,429,470,471,472,478,479,480,481,482,487,489,490,491,492,497,498,701,702,704,708,709,710,712,714,718,719,720,721,724,728,729,740,741,742,748,749,780,781,782,784,789,790,791,792,794,798,801,802,804,807,809,810,812,814,817,819,820,824,827,829,840,841,842,847,849,870,871,872,874,879,890,891,892,894,897,901,902,904,907,908,910,912,914,917,918,920,921,924,927,928,940,941,942,947,948,970,971,972,974,978,980,981,984,987.