a) 3
b) 4
c) 5
d) 6
Explanation:
x * 1 = 3 * 5/3
x = 5
2. What number has a 5:1 ratio to the number 10?
a) 30
b) 40
c) 50
d) 60
Explanation:
5:1 = x: 10
x = 50
3. If a: b = 7: 5, b: c = 9: 11, find a: b: c?
a) 45: 63: 55
b) 55: 45: 63
c) 55: 63: 45
d) 63: 45: 55
Explanation:
a: b = 7: 5
b: c = 9: 11
a: b: c = 63: 45: 55
4. If a: b = 3:4, b:c = 7:9, c:d = 5:7, find a:d?
a) 5/12
b) 2/3
c) 5/6
c) 7/12
Explanation:
a/d = (3/4)*(7/9)*(5/7) => 5/12
5. The inverse ratio of 3: 2: 1 is?
a) 2:3:6
b) 6:3:2
c) 2:6:3
d) 3:2:6
Explanation:
1/3: 1/2: 1/1 = 2:3:6
6. The duplicate ratio of 3:4 is?
a) 4:3
b) 3:4
c) 9:16
d) 16:9
Explanation:
3^2: 4^2 = 9:16
7. The triplicate ratio of 1:2 is?
a) 1:2
b) 1:8
c) 1:9
d) 8:1
Explanation:
1^3: 2^3 = 1:8
8. The sub-duplicate ratio of 1:4 is
a) 4 : 1
b) 1 : 16
c) 2 : 1
d) 1 : 2
Explanation:
√1 : √4 = 1 : 2
9. The third proportional to 1 and 2 is?
a) 1
b) 2
c) 1/4
d) 4
Explanation:
(2*2)/1 = 4
10. The fourth proportional to 12, 14 and 18 is?
a) 14
b) 21
c) 28
d) 35
Explanation:
(14*18)/12 = 21
Source: safalta
