What is the value of $${{0.6}÷{0.6}×{0.6}+{0.5}×{0.5}÷{0.5}\over{0.6}×{0.5}+{0.3}}$$ ?

The following pie chart gives the measures of the central angles of the sectors that reflect the number of beds in each of 7 different hospitals with respect to the total number of beds in these 7 hospitals taken together.
 
 

If the number of beds in H7 are 39, then what is the total number of beds in all the 7 hospitals taken together?

If P : Q = 4 : 5 and P : R =2 : 3, then what is 3P : 4Q : 5R?

The following pie chart gives the central angles of the sectors representing the number of cameras sold form a shop from July to November in a certain Year.

what percentage are the sales in July of the total sales from July to November

The sum of the squares of two positive integers is 100 and the difference of their squares is 28. The sum of the numbers is: 

If 738 A6A is divisible by 11, then the value of A is-

The in-radius of an equilateral triangle is of length 3 cm. Then the length of each of its medians is 

The length of diagonal of a square is $${15\sqrt { 2}}$$cm. Its area is