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: 

Find the value of x:
2³ × 3⁴ × 1080 ÷ 15 = 6^x

The simplified value of
$${{1\over 3}÷{1\over 3}×{1\over 3}\over{1\over 3}÷{1\over 3}of{1\over 3}}-{1\over 9}$$

Find the value of given expression. 

[76 – {90 ÷ 5 ⨯ (24 – 36 ÷ 3) ÷ 3}] 

If (a + b):(b + c):(c + a) = 7:6:5 and a + b + c = 27, then what will be the value of 1/a: 1/b :1/c?

$$3\sqrt{ {72.9\over0.4096}}$$ is equal to : 

$$ {4\over 5}×[{1\over 2}\ of\ 25]+12÷{3\over 4}-32=?$$

What is the value of X ?, if 7580 - X = 3440