Subduplicate Ratio

Q.

What is the sub-duplicate ratio of 49:121?

1. 7:5

2. 9:81

3. 7:11

4. 9:25

Q.

Find the ratio compounded of the reciprocal ratio of 15 : 28, the sub -duplicate ratio of 36 : 49 and the triplicate ratio of 5 :4.

Q.

Find the sub-duplicate ratio of $9:16$.

Q.

Let A = {1, 2, 3}. The total number of distinct relations that can be defined over A is 9. State True/False.

1. 2⁹

2. 6

Q.

Find the compound ratio of: Duplicate ratio of 4 : 5 and triplicate ratio of 5 : 3.

1. 

2. 

3. 

4. 

Q.

Find the ratio compounded of the duplicate ratio of 5 : 6, the reciprocal ratio of 25 : 42 and the sub-triplicate ratio of 216 : 343.

1. 1 : 1

2. 1 : 2

3. 2 : 1

4. 2 : 3

Q.

Find the compounded ratio of the duplicate ratio of 3 : 5, the reciprocal ratio of 4 : 25, and the sub-duplicate ratio of 16 : 81.

1. 1 : 1

2. 1 : 2

3. 2 : 3

4. 2 : 1

Q. The sub-duplicate ratio of 81 : 25 is _________.

1. 9 : 5
2. 5 : 9
3. 25 : 9
4. 9 : 25

Q.

If the product of two numbers is 21 and their difference is 4, then the ratio of the sum of their cubes to the difference of their cubes is:

1. 185 : 165

2. 165 : 158

3. 185 : 158

4. 158 : 145

Q. The sub-duplicate ratio of $(a+b{)}^2$ : $(a-b{)}^6$ is _________________.

1. (a + b) : $(a-b{)}^2$
2. (a - b) : (a + b)
3. (a + b ) : (a - b)
4. (a + b) : $(a-b{)}^3$

Q.

The duplicate ratio of 5: 6 is ____

1. 10 : 12

2. 25 : 36

3. 1 : 6

4. 15 : 18

Q.

Find the number for the box, if the following numbers are in proportion:

$15,20,\square ,36$

Q. The sub-duplicate ratio of $\frac{1}{25}:\frac{1}{64}$ is _____

1. $\frac{1}{5}:\frac{1}{8}$
2. $5:4$
3. $\frac{1}{125}:\frac{1}{252}$
4. $1:1$

Q.

If 3² – 7 – 6² = 0 find the value of : . Hence find the value of duplicate and triplicate ratio of : .

1. x³/y³ = 21/9

2. x³/y³ = 27/1

3. x³/y³ = 22/8

4. x³/y³ = 28/1

Q. The duplicate ratio of 2 : 3 is

1. 5 : 12
2. 4 : 9
3. 8 : 19
4. 16 : 84

Q. The sub-duplicate ratio of $25m^2:49n^2$ is _____

1. $49m^2:25n^2$
2. $25m:49n$
3. $7m:5n$
4. $5m:7n$

Q.

Find the compounded ratio of 2a:3b, and .$mn:x^{2}andx:n$

Q.

Two forces F1 and F2 acting at a point have a resultant F. If F2 is doubled, F is also doubled. If F2 is reversed in direction, then also F is doubled. Then F1:F2:F =

Q. Duplicate ratio of 7 : 9 is 49 : 81

1. True
2. False

Q.

1. Rs 70, Rs 85

2. Rs 100, Rs 85

3. Rs 70, Rs 95

4. Rs 100, Rs 85

Q. The subduplicate ratio of $(x^2-y^2{)}^2:(x+y{)}^2$ is _____

1. $x^2-y^2:1$
2. $x-y:1$
3. $x+y:1$
4. $1:x+y$

Q. Find the value of k for which
is continuous at x = 0;

Q. The sub-duplicate ratio of $9a^2{b}^2:16r^2{s}^2$ is _____

1. $4ab:3rs$
2. $3a:4r$
3. $3ab:4rs$
4. $3b:4s$

Q. Find the sub-duplicate ratio of 81 : 64 ?

1. 8 : 9
2. 4 : 9
3. 9 : 8
4. 7 : 8

Q. The sub-duplicate ratio of $9:16$ is _____

1. $3:4$
2. $81:256$
3. $4:3$
4. $\sqrt{3}:\sqrt{4}$

Q. If $x:y=30:20$ and $y:z=24:25$ then the subduplicate ratio of $x:z$ is ____

1. $6:5$
2. $36:25$
3. $5:6$
4. $30:25$

Q. Find the ratio compounded of the subduplicate ratio of 36: 49, the reciprocal ratio of 15: 28 and the triplicate ratio of 5 : 4.
(A) 25 : 8
(B) 30 : 4
(C) 22 : 5
(D) 15 : 7
$\left[1\right]$

Q. Find the value of x, if:
(2x + 1): (3x + 13) is the sub-duplicate ratio of 9: 25

Q.

Find sub-duplicate ratio of :

(i) 9 : 16 (ii) $(x-y{)}^4:(x+y{)}^6$

Q. (2x-5):(3x+1) is the duplicate ratio and of 2:3, find the value of x.