10th class Math Unit 3 MCQs
Chapter 3 MCQs 10th Class Math
Variations:
1. In a ratio a:b, a is called:
a. Consequent
b. Relation
c. Antecedent
d. None of these
2. In a ratio x:y, y is called:
a. Consequent
b. Relation
c. Antecedent
d. None of these
3. In a proportion a:b :: c:d, a and d are called:
a. Third proportional
b. Means
c. Extremes
d. None of these
4. In a proportion a:b :: c:d, b and c are called:
a. Fourth proportional
b. Means
c. Extremes
d. None of these
5. In continued proportion a c = b2, a :b = b:c is said to be ……… proportional between a and c:
a. Means
b. Third
c. Fourth
d. None of these
6. In continued proportion a:b = b:c is said to be ……… proportional to a and b:
a. Means
b. Third
c. Fourth
d. None of these
7. Find x in proportion 4:x :: 5:15:
a. 3/4
b. 75/4
c. 12
d. 4/3
8. If u ∝ y2, then:
a. uy2 = k
b. u = y2
c. uy2 = 1
d. u = ky2
9. If y 2 ∝ 1/x 3 , then:
a. y2 = x2
b. y 2 = k/x3
c. y2 = kx3
d. y2 = 1/x3
10. If u/v = v/w = k, then:
a. u = w2k
b. y = wk2
c. u = y2k
d. u = vk2
11. The third proportional of x2 and y2 is:
a. y4/x2
b. y2/x2
c. y2/x4
d. x2y2
12. The fourth proportional w of x:y :: v:w is:
a. xyv
b. xy/v
c. x/vy
d. vy/x
13. If a:b = x:y,then alternando property is:
a. a+b/b = x+y/y
b. a/x = b/y
c. a-b/x =x-y/y
d. a/b = x/y
14. If a:b = x:y, then invertendo property is:
a. a+b/b = x+y/y
b. a/x = b/y
c. b/a = y/x
d. a/a-b =x/x-y
15. Af a/b = c/d , then componendo property is:
a. ad/bc
b. a/a+b = c/ c+d
c. a-b/b = c-d/d
d. a-a/b = c/c-d
16. The ratio of 1 km to 600 m is:
a. 3:2
b. 1:6
c. 2:1
d. 5:3
17. In a:b::b:c, c is called:
a. Mean proportional
b. Fourth proportional
c. Continued proportional
d. Third proportional
18. If a/b = k and c/d = k then a=bk and c=?
a. ck
b. dk
c. bk
d. ak
19. If p, 12 and 3 are continued proportion then p is equal to:
a. =9
b. =36
c. =6
d. =15
20. Af a/b = c/d, then componendo property is:
a. ad/bc
b. a/a+b = c/ c+d
c. a-b/b = c-d/d
d. a/a-b = c/c-d
21. If y=8 and x=4 then in k=xy, we get k=?
a. 84
b. 12
c. 114
d. 32
22. The ratio of a and b is written as:
a. a:b
b. b/a
c. a=b
d. a::b
23. If x = 7, y = kx, y = 6, then k is equal to:
a. 13
b. 42
c. 6/7
d. 7/6
24. If y = kx2z, y = 6, x = 4, z = 9, then k is equal to:
a. 1/64
b. 1/8
c. 1/24
d. 1/49
25. In proportion 7 : 4 :: p : 8, p is equal to:
a. 32/7
b. 14
c. -14
d. 7/2
26. The fourth proportion of x : y :: v : w is:
a. xvy
b. xy/v
c. x/vy
d. vy/x
27. In proportion 15 : 7 :: x : 56, x is equal to:
a. 15/18
b. 120
c. 8/15
d. 100
28. In continued proportion a : b = b : c, a c = b2, it is said to be ……… proportional to a and c.
a. Mean
b. Third
c. Fourth
d. None of these
29. A ratio has:
a. Three units
b. One unit
c. No unit
d. Two units
30. In x:z, z is:
a. Antecedent
b. Relation
c. Consequent
d. None of these
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