If we find the square root of 13 ans 14 we get
sqrt(13) = 3.60555
sqrt(14) = 3.74166
All Real numbers can be rational number and irrational number.
We can write 3.7 as 37/10, which is the easy rational number and an irrational number within the range is sqrt (27/2)
Real number system is used in mathematics and statistics.