'In the following questions, three out of four words

If x ,y,z are three integers such that x +y = 8,y +z =13 and z +x =17,then the value of x² /yz   is:

Calculate the difference between (7.225) ² - (2.275) ²     

If a = 55, then what is the value of

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

If the sum of (x/y)   and its reciprocal is 1, then the value of x⁶ – y⁶ will be.

If a + b + c = 0, then what is the value of a³ + b³ + c³ - 3abc?

If the 14th term of an arithmetic series is 6 and 6th term is 14, then what is  the 95th term?

If a = 901, b= 903, and c= 906, then find the value of a³ + b³ +c³ –3abc?