Quantitative Aptitude - Arithmetic Ability Questions

In a class of 65 students there are 39 girls. The average weight of these girls is 60 Kg and average weight of the full class is 64 kgs. What is the average weight of the boys of the class?

The average marks obtained by a class of 60 students is 65. The average marks of half of the students is found to be 85. The average marks of the remaining students is

Deepak marks the price of his table 60% above the cost price. He gives some discount on it and earns profit of 15.2%. What is the discount percentage?

The ratio of present ages of P and Q is 5 : 8. Three years later their ages will be in ratio 8 : 11. What is the present age (in years) of Q?

The value of x for which the expressions 5x + 17 and 17x - 5 become equal is _____.

At what rate of compound interest per annum will a sum of Rs 50000 become Rs 73205 in 2 years?

What is the simplified value of cosec6A – cot6A – 3 cosec2A cot2A?

If cot(A/2) = x, then x is equal to