Which set of numbers does not include the square root of 25?
a. irrational numbers
b. integers
c. rational numbers
d. whole numbers
explain why

First calculate square root of 25. It is 5 because 5 squared is 25.

So 5 is not an irrational number because it can be put into a fraction, 5/1. An irrational number like pi, cannot be put into a fraction.

A. Irrational Numbers

Hope this helps :)

A. Irrational Numbers 
the square root of 25 is 5
25 is a perfect square, it mean that a number squared is that number like 9,25,36 are perfect squares.
25 is a Rational  number.
it is a whole number for it doesn't have a decimal.
and any positive or negative number is an integer.