Three positive numbers are in the ratio of 11 : 12 : 15. If the sum of the squares of those numbers is 1960, then the sum of the numbers is

Value of $$ \sqrt{6+\sqrt {6+\sqrt {6+....}}}$$

Find the value of. 67²–33².

Given that 10^0.48 = x, 10^0.70 = y and x² = y², then the value of z is close to

If a-b=10 and ab=-21, then what is the value of a³-b³?

If x = 2 then the value of $$ x^3 + 27x^2 + 243x + 631$$ is:

If a = 2.234, b = 3.121 and c = –5.355, then the value of $$ a^3 + b^3 + c^3 – 3abc$$ is

Given k = -3. Find the value of $$ {k^3+3k}$$.