Răspuns :
Explicație pas cu pas:
a) 137,237,337,437.
b)138,237,336,435,534,633,732,831,930.
c)500,502,504,506,508,510,512,514,516,518,520,522,524,526,528,530,532,534,536,538,540,542,544,546,548,550,552,554,556,558,560,562,564,566,568,570,572,574,576,578,580,582,584,586,588,590,592,594,596,598.
Răspuns:
a) de la 137 la 427
b) de la 130 până la 930
c) de la 500 până la 598.