The sum of two natural numbers is 80 and their HCF is

If √d + (1/√d) = 6, then find the value of d + (1/d).

If 'x' = √10, then find the value of (x - 1)² + (x + 1)²

The coefficient of ‘b²’ in (3a + b)³ is

If (a - b - c) = 6, and (ab - bc + ca) = 117, then find the value of (a ²  + b ²  + c ² )

Evaluate (998)³ without multiplying directly.

If a = 701, b= 703 and c= 706, then find the value of a³ + b³ +c³ –3abc?

If (9x + 4y) = 808 and 2x:5y = 18:25, then find the value of (2x² + 3y²).

Find the number of zeroes in 24 × 50 × 64 × 15.