A. 4
B. 5
C. 6
D. 8
The number of positive integers n in the range 12 ? n? 40 such that the product (n – 1) (n –2)…3.2.1 is not divisible by n is
If 4x + 5y = 83 and 3x/2y = 21/22 how much is y – x
Solve for real x: 6x2 + 5x - 6 ≥ 0
If x=1+2a+3a2+4a2+……( -1 < a < 1 ) and y=1+3b+6b2+10b3+……( -1 < b < 1 )then find 1+ab+(ab)2+(ab)3+….. in terms of x and y.
The cost of 8 Sharpeners and 12 Pens is Rs. 76/- What is the cost of 20 Sharpeners and 30 Pens?
If n(x) = x2 - 10x, then n(-10) =
Let x and y be consecutive integers. Suppose m be the number of solutions of x3 − y3 = 3k2 and n be the number of solutions of x3 − y3 = 2t2,where k, t are integers. Then m + n equals:
If (x + 4) (x + 6) (x +1) 2> 0, then the solution set for the inequality is
If 5x + 9 > 3x + 19, what is the range of values x can take?
The g.c.d. of x3 + x2 – x – 1 and x2 – 1 is