If x^y=64 and x and y are positive integers, then x + y can take how many values
A. 3B. 4C. 5D. 6E. 7
Ratio of two numbers x and y is 3:5. If x is increased by 20% and y is increased by 8 then the new ratio becomes 2:5. what is the ratio 2y:(x+6)
A. 2:5B. 3:5C. 4:5D. 5:3E. 10:3
If |x−y|=0 , what is the value of |x|−|y|?
A. -1B. 0C. 1D. 2E. 4
If 5−6/x=x , then x has how many possible values?
(A) None(B) One(C) Two(D) A finite number greater than two(E) An infinite number
If 4 is one solution of the equation x^2 + 3x + k = 10, where k is a constant, what is the other solution?
(A) -7(B) -4(C) -3(D) 1(E) 6
If x/y=3/2 and y/z=4/6, then x−z=
A. 0B. 1C. 3/2D. 2E. 5
How many litres of a 12 litre mixture containing milk and water in the ratio of 2 : 3 be replaced with pure milk so that the resultant mixture contains milk and water in equal proportion?
A. 1.0 litres
B. 1.5 litres
C. 2.0 litres
D. 4.0 litres
E. 4.0 litres
If |x + 1| = 2|x - 1|, what is the sum of the roots?
A. 4B. 6C. 8D. 20/3E. 10/3
If 6x - 15y = 33, and 6y - x = -18, what is the sum of x and y?
(A) -7(B) -5(C) 2(D) 5(E) 12
What is the range of all the roots of |x^2 - 2| = x ?
A. 4B. 3C. 2D. 1E. 0
