Quantitative Aptitude Ratio & Proportion 1

Quantitative Aptitude – Ratio & Proportion – Questions – 03

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1. Two numbers are in the ratio 3 : 4 and the product of their L.C.M. and H.C.F. is 10800. The sum of the numbers is :

 
 
 
 

2. Gold is 19 times as heavy as water and copper is 9 times as heavy as water. In what ratio should these be mixed to get an alloy 15 times as heavy as water ?

 
 
 
 

3. The ratio of the number of boys and girls in a school is 3 : 2. If 20% of the boys and 25% of the girls are scholarship holders, the percentage of the school students who are not scholarship holders, is :

 
 
 
 

4. 15 litres of a mixture contains 20% alcohol and the rest water. If 3 litres of water be mixed in it, the percentage of alcohol in the new mixture will be :

 
 
 
 

5. The marks obtained by Praveen and Vijay are in the ratio 4 : 5 and those obtained by Vijay and Suresh are in the ratio of 3 : 2. The marks obtained by Praveen and Suresh are in the ratio of :

 
 
 
 

6. An ornament weighs 12.5 gms of which 2.5 gm is pure silver and the rest alloy. The ratio of pure silver to alloy is :

 
 
 
 

7. 85 kg of a mixture contains milk and water in the ratio 27 : 7. How much more water is to be added to get a new mixture containing milk and water in the ratio 3 : 1 ?

 
 
 
 

8. Ramlal divides two sums of money among his four sons Anil, Rahul, Deepak and Sanjeev. The first sum is divided in the ratio 4 : 3 : 2 : 1 and second in the ratio 5 : 6 : 7 : 8. If the second sum is twice the first, the largest total is received by :

 
 
 
 

9. Anshul got twice as many marks in English as in Science. His total marks in English, Science and Maths are 180. If the proportion of his marks in English and Maths is 2 : 3, what are his marks in Science ?

 
 
 
 

10. The ages of Z and Y are in the ratio of 3 : 1. Fifteen years hence, the ratio will be 2 : 1. Their present age (in years) are :

 
 
 
 

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