Question

number series: 3,9,13,65,71,____,_____.

Answer 1

number series: 3,9,13,65,71,75,127

Answer 2

Let a¹=3, a²=9, a³=13, a⁴=65, a5=71. a²-a¹= 9-3=6 a³-a²=13-9=4. a⁴-a³=65-13=52. a5-a⁴=71-65=6. It means that continue.So the next number are: a6=75 and a7=127.