If $$0.72\overline{45} =\frac{a}{b}$$​, where the HCF of a and b is 1, then what is the value of (b-a)?

What type of number is the sum of √ 2 and (3-√ 2) ?

If we consider the set of rational numbers and the set of irrational numbers, what elements are present in both sets?

'π' is-

Which of the following rational numbers does not lie between 3/5 and 4/5?

If a and b are two odd prime numbers such that a > b, then a² − b² is:

3.13113111311113… is :

​If ‘a’ is an even positive integer and ‘b’ is an odd positive integer, then the true statement is:​

Which of the following rational number lies between $$\frac{1}{4}$$​ and $$\frac{1}{2}$$​.

Express  0.$$\overline{27}$$ in the form $$\frac{p}{q}$$​ , where p and q are integers and q # 0.