Simplify : $$ {5\over3}×{7\over51}\ of \ {17\over5}-{1\over3}\over {2\over9}×{5\over7}\ of \ {28\over5}-{2\over3}  $$

Given that ( 1² +2²+3²+………..+10²)=385, the value of (2²+4²+6²+……20²) is equal to

Direction : What should come in place of the question (?) in the following question.

140% of 450 + 24% of 650 =?

The number, whose square is equal to the difference between the squares of 975 and 585, is: 

(5.5)³-(4.5)³ is equal to : 

Evaluate: $${-(4-6)^2-3(-2)+।-6।\over 18-9÷3×5}$$

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: