Reuben says, "two days ago i was 20 years old. later next year, i will be 23 years old." how is this possible?

Let us always base on the present age. We denote this by x. Now, the age he had 2 years ago would then be denoted as (x-2). Let's equate this to 20 years old.

x - 2 = 20

x = 20 + 2

x = 22 years old

He should be 22 years old now.

Let's check the other condition. After 1 year, his age should be (x+1). Let's equate this to 23 years old.

x + 1 = 23

x = 23 - 1

x = 22

Thus, this is possible if Reuben is 22 years old as of the present.