Which of the following statements is not true regarding

If x + y = 4 and (1/x) + (1/y) = 24/7, then the value of (x³ + y³).

If (x²+y²+z²)/(xy+yz+zx) = 1

Find (x+y)/z + (y+z)/x + (z+x)/y

If sin 28° = 15/17 , then tan 62° = ?

22% of ‘x’ is equal to 66% of ‘y’, then find the value of x: y.

Evaluate (998)³ without multiplying directly.

If x −y =4and xy =45,thenthevalueof x ³ −y³is:

If a + b + c = 5, a³ + b³ + c³ = 85 and abc =25, then find the value of a² + b² + c² – ab –bc – ca

If x + y + z = 30, x² + Y² + z² = 460 and x z = y², then find the value of x z?

Find the number in place of ?

6, 14, 26, ?, 106, 214

If x² - 3x + 2 is a factor of, x⁴ - px² + q, then (p, q) =