What is the sum of the first 12 terms of an arithmetic progression if the 3rd term is -13 and the 6th term is -4?
1). 67
2). 45
3). -30
4). -48
6. A number is 25 more than its two-fifth. What is the number?
7. If (a – 1/a) = 3/4, find the value of (a3 – 1/a3).
9. If n is a three-digit number and n2 = ___34. How many values for n are possible?
10. If x3 + 5x2 – kx + 6 is divided by (x - 2), the remainder is 0. The value of k is equal to