Simplify: (423×423-325×325)/(423-325)

There are 540 students in a school. One-third of them are girls. Three-fifth of the number of boys are players and one-fourth of the girls are players. Total number of players in the school is

If $$(7\frac{2}{p} \times 3\frac{1}{5}) = 24$$​, then value of p is

​$$750 \frac13+750 \frac1{15}+750 \frac1{35}+…750 \frac1{99}=?$$​​

Simplify the following expression:
$$[3.75 + \frac{4}{5}] - [3.5 - \frac{8}{20}]$$​

Which number should replace x in the following equation?
​$$\frac{x}{34} = \frac{306}{x}$$​​

The value of $$\frac{5}{5+\frac{1}{4-\frac{1}{\frac78}}}+\frac{7}{107}$$​ is:

Evaluate:
$$\frac{12\times272\div16+264}{1256\div32-26.25}$$​=?

What should replace '?' in the equation given below?
​$$5\frac{10}{17}\div 7\frac{12}{34}-\frac{3}{25}=(?)^2$$​​

What is the reciprocal of $$\frac{ 2}{3}$$​?

Which of the following fractions is equivalent to 0.75 ?