If a - b = 10 and ab =-21, then what is the value of $a^{3} - b^{3}$?
1). 316
2). 370
3). 185
4). 158
2. If the sum of two numbers is 5 and the sum of their squares is 14, then their product is equal to
4. If 5x - 5(3x - 2) < 4x - 1 < 2 + 2x, then x can take which of the following values?
5. Which of the following is correct?
8. The sum of a non-zero number and twice its reciprocal is 33/4. Find the number.
10. If (x – 3)2 + (y – 5)2 + (z – 4)2 = 0, then the value of x2/9 + y2/25 + z2/16 is: