If a - b = 2 and ab = 24, then what is the value of $a^{3}- b^{3}$?
1). 280
2). 124
3). 140
4). 152
1. If (8x - 4) = (3x + 6), then the numerical value of $(x + 1)^{3}$ is
2. If a + 1/a = 14.29% of 42, then find the unit digit of expression a2 + 1/a2.
5. The sum of a non - zero number and thrice its reciprocal is 52/7. Find the number.
7. If x+$\frac{1}{x}$=5, then find the value of $\frac{6x}{x^{2}+x+1}$