Quantitative Aptitude - Arithmetic Ability Questions

What is the value of 36+729381+643

If l + m + n = 9 and l2+m2+n2 = 31, then the value of lm + mn + nl will be

If 310 × 272 = 92 × 3n then the value of n is

If x+1x ≠0 and x3+1x3 = 0, then the value of x+1x4 is :

If x+1x:x-1x=5:3 then the value of x is

The value of(1(p-n)(n-q)+1(n-q)(q-p)+1(q-p)(p-n)) is

The angle of elevation of the top of a tower from two horizontal points (in opposite sides) at distances of 25 meter and 64 meter from the base of tower are x and 90° - x respectively . The height of the tower will be

Simplify: (213 x 213 + 187 x 187)