There are an infinite number of rational numbers between '2' and '5', so pick any 10 numbers as decimal numbers unless the problem statement specifies fractions:

2.1, 2.4, 2.7, 3.1, 3.4, 3.7, 4.1, 4.4, 4.7, and 4.9

An irrational number would be a fraction like "10/3", but 2.1 is "21/10", non-repeating and it is a rational number.