Question

explain the difference between surds and irrational numbers

Answer 1

surd number is irrational root of an onteger....
surds are irrational numbers
irrational numbers cannot be expressed as fractions for any integers..
example
$\sqrt{2 \div 7}$
example of surd is
$\sqrt{2}$
which cannot be further simplied so it s a surd
for example
$\sqrt{4}$
which can be simplified to 2.. hence it cannot be a surd