Quantitative Aptitude - Arithmetic Ability Questions

If a shopkeeper sells an item at Rs 4200 which is marked as Rs 4800, then what is the discount (in %) that he is offering?

An engineering student has to secure 25% marks to pass. He gets 47 and fails by 43 marks. What are the maximum marks of the examination?

If (4a-3)2=0,then the value of 64a3+12a+13 is

The ratio of present ages of R and S is 6:7. Before 12 years the ratio of their ages was 9:11. What is R's present age (in years)?

What will be the net discount percentage of three successive discounts of 20%, 10% and 30%?

The sum of a fraction and 4 times its reciprocal is 13/3. What is the fraction?

What is the unit digit of 15+25+35+...+205 ?

In the following question, select the odd number from the given alternatives.