and 
, then
which of the following is a constant?1. If x : y
= 2 : 3 and z : x = 5 : 4, then x : y : z =A. 2 : 3 : 4 B. 4 : 5 : 6 C. 4 : 6 : 5 D. 5 : 4 : 3 E. 20 : 15 : 8
2. A train travels at a speed of 160 km/h. How long would it take to travel 240 km?
A. 0.6 hr B. 0.67 hr C. 1.2 hrs D. 1.5 hrs E. 2 hrs
3. A sum of money is shared among A, B, C and D in the ratio 1 : 2 : 3 : 5. If C gets $750,
then B gets
A. $250 B. $500 C. $750 D. $1 250 E. $2 750
4. In a Mathematics test, the ratio of John¢ s marks to that of Mary is 5 : 4.
If Mary gets 20 marks less than John, how many marks does John get?
A. 20
B. 40 C. 60 D. 80 E. 100
5. A machine produces 450 nails in 1.5 hours. How many nails does it produce
in 20 minutes if it produces nails at a constant rate?
A. 100
B. 150 C. 450 D. 900 E. 1 000
6. If 8 workers can finish a job in 6 days, then how many days are required to finish
the same job when 4 more workers are added?
A. 3 B. 4 C. 5 D. 9 E. 12
7. If x varies jointly as and , then
which of the following is a constant?
A. x B.
C. 
D. 
E. 
8. y partly
varies directly as x and partly varies directly as 
. When x
When x
= 2, y = 5. Find the value of y when
.
A.
B. 
C.
D. 
E. 
9. If 2a
= 4b = 5c, then
A. 2 : 4 : 5 B. 5 : 4 : 2 C.
D. 
E. 10 : 5 : 4
10. If a : b : c
= 2 : 5 : 6, then (a + b) : (b + c) =A. 7 : 8 B. 7 : 11 C. 8 : 7 D. 8 : 11 E. 11 : 7