Ratio and Proportion Online Test 5

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Question : 1/20 20 : 00

If a : b = 3 : 4 and b : c = 8 : 9, then a : c = ?

A. 1 : 2

B. 3 : 2

C. 1 : 3

D. 2 : 3

If A : B = 1 : 3, B : C = 5 : 7, C : D = 9 : 7, then A : B : C : D = ?

A. 15 : 45 : 63 : 49

B. 15 : 49 : 45 : 63

C. 45 : 15 : 63 : 49

D. 49 : 15 : 45 : 63

If 3a + 5b3a − 5b = 5, then a : b = ?

A. 2 : 1

B. 3 : 2

C. 5 : 2

D. 5 : 3

If 5x² − 13xy + 6y² = 0, then x : y = ?

A. (5 : 3) or (1 : 2)

B. (3 : 5) or (2 : 1)

C. 2 : 1

D. 3 : 5

What number has to be added to each term of 3 : 5 to make the ratio 5 : 6 ?

A. 6

B. 7

C. 12

D. 13

The ratio of earnings of A and B is 8 : 9. If the earnings of A increase by 50% and the earnings of B decrease by 25%, the new ratio of their earnings is 16 : 9. What are A's earnings ?

A. Rs. 22000

B. Rs. 28500

C. Rs. 37000

D. None of these

In a ratio which is equal to 5 : 8, if the antecedent is 40, then the consequent is :

A. 25

B. 64

C. 48

D. None of these

Two whole numbers whose sum is 64, cannot be in the ratio :

A. 5 : 3

B. 7 : 1

C. 3 : 4

D. 9 : 7

Three numbers are in the ratio 3 : 4 : 5. The sum of the largest and the smallest equals the sum of the third and 52. The smallest number is :

A. 20

B. 27

C. 39

D. 52

Rs. 355 were divided among A, B, C in such a way that A had Rs. 20 more than B and C had Rs. 15 more than A. How much was C's share ?

A. Rs. 100

B. Rs. 120

C. Rs. 135

D. Rs. 150

Some money is divided among A, B and C in such a way that 5 times A's share, 3 times B's share and 2 times C's share are all equal. The ratio between the shares of A, B, C is :

A. 5 : 3 : 2

B. 2 : 2 : 5

C. 15 : 10 : 6

D. 6 : 10 : 15

Vessels A and B contain mixtures of milk and water in the ratio 4 : 5 and 5 : 1 respectively. In what ratio should quantities of mixtures be taken from A to B to form a mixture in which milk to water is in the ratio 5 : 4 ?

A. 2 : 5

B. 2 : 3

C. 4 : 3

D. 5 : 2

The speeds of three cars are in the ratio 3 : 4 : 5. The ratio between the times taken by them to travel a fixed distance, is :

A. 3 : 4 : 5

B. 5 : 4 : 3

C. 12 : 15 : 20

D. 20 : 15 : 12

The average age of 3 girls is 20 years and their ages are in the proportion 3 : 5 : 7. The age of the eldest girl is :

A. 20 years

B. 28 years

C. 35 years

D. 30 years

A man's age was 5 times his son's age 5 years ago and will be three times his son's age after 2 years. The ratio of their present ages is :

A. 5 : 2

B. 5 : 3

C. 10 : 3

D. 11 : 5

If 30% of A = 0.25 of B = 0.20 of C, then A : B : C is :

A. 10 : 12 : 15

B. 10 : 15 : 12

C. 12 : 15 : 10

D. 15 : 12 : 10

What must be subtracted from each one of 21, 38, 55, 106 so that the remainders are proportional ?

A. 2

B. 4

C. 6

D. 8

If m is proportional to n, and m = 5 when n = 4, then what is the value of m when n = 18 ?

A. 20

B. 22.5

C. 24.5

D. 26.5

The surface areas of two spheres are in the ratio 1 : 4. The ratio of their volumes is :

A. 1 : 4

B. 1 : 2

C. 1 : 6

D. 1 : 8

In an alloy, the ratio of copper and zinc is 5 : 2. If 1.250 kg of zinc is mixed in 17 kg 500 g of alloy, then the ratio of copper and zinc in the alloy will be :

A. 1 : 2

B. 2 : 1

C. 2 : 3

D. 3 : 2

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Ratio and Proportion Online Test 5

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