G90 mathn

7 ,x=……….
A. 180 B.160 C.154 D.140 E.120

1. The sum of three constitutive integers is 54. The largest number is
   A. 16 B.20 C.8 D.19 E.17

x 1 2 3 4 6 10
y 6 3 2 1.5 1 0.6

The table shows the variation of y with respects to x . The constant of variation k is
A. 0.06 B. 16 C. 23 D. 32 E. 6

1. P varies directly as x and inversely as the square of y. If x is decreased by 30% and y is
   decreased by 20% , the percentage change in p is
   A. increase 10% B. decrease 10% C. increase 9.4% D. decrease 9.4% E.N0. change
2. Let x varies inversely as y2 and y varies directly as z .Which of the following is (are) true?
   1.xy2= constant 2. = y2z= constant 3. xz= constant
   A. 1 only B. 2 only C. 3 only D. 2 and 3 only E. 1,2 and 3
3. If x varies directly as y2 and inversely as z. Find the percentage increase of x when y is
   increase by 25% and z is decreased by 20%,
   A. 5% B.50% C.85% D.95% E.100%
4. If x varies directly as y and inversely as square of z and that x= 10 when y=4 and z=14
   Then y=16 and z=7, x=………..