If x>1 and a /b=1−1 /x, then b /a=

A. x

B. x - 1

C. x−1/x

D. x/x−1

E. 1 /x −1

How many factors of 330 are odd numbers greater than 1?

A. 3
B. 4
C. 5
D. 6
E. 7

Class A has boys to girls in the ratio 2 : 3, and Class B has girls to boys in the ratio 5 : 3. If the number of students in Class A is at least twice as many as the number of students in Class B, what is the minimum percentage of boys possible, when both classes are considered together?

A. 30%
B. 33.33%
C. 37.5%
D. 39.17%
E. 40%

What is the product of all roots of the equation (x+1)^2=|x+1| ?

A. -2
B. -1
C. 0
D. 1
E. 2

If x = 3 and y = 1/6 then the value of x in terms of y is?

A. 0.5y
B. 2y
C. 4y
D. 8y
E. 18y

The average (arithmetic mean) of 30 integers is 5. Among these 30 integers, there are exactly 20 which do not exceed 5. What is the highest possible value of the average (arithmetic mean) of these 20 integers?

A. 3
B. 3.5
C. 4
D. 4.5
E. 5

A candidate scoring 25% marks in an examination fails by 30 marks while another candidate who scores 50% marks gets 30 marks more than the pass mark. What is the pass mark?
(A) 33.33
(B) 50
(C) 66.66
(D) 70
(E) None of these

Packet X contains pens, pencils and erasers in the ratio 1:2:3. Packet Y contains pens and pencils in the ratio 4:5. If the total number of pens and pencils in both the packets combined is 13 and 20 respectively, what is the number of erasers in Packet X?

A. 5
B. 6
C. 15
D. 18
E. 20

If (x + 4)(3x + 1) = 3x^2 + x, what is a possible value of x?

(A) 1
(B) 1/2
(C) 1/3
(D) -1/3
(E) -1/2

If (x + 4)(3x + 1) = 3x^2 + x, what is a possible value of x?

(A) 1
(B) 1/2
(C) 1/3
(D) -1/3
(E) -1/2