Quantitative Aptitude - Arithmetic Ability Questions

A, B and C can do job in 9, 12 and 36 days respectively if they worked alone. A leaves after they have worked together for 3 days. In how many days can B and C do the rest of the job?

In a class of 55 students there are 34 girls. The average weight of these girls is 51 Kg and average weight of the full class is 55.2 kgs. What is the average weight of the boys of the class?

Sachin lent out Rs 60000 in two parts, first at 4% and the second at 10% interest. The yearly average interest comes out to be 6.4%. What are the amounts (in Rs) that were lent at 4% and 10% respectively?

A bus moves at a speed of 84 km/hr after repairing and moves at a speed of 56 km/hr before repairing. It covers 2x distance in 8 hours after repairing.How much time (in hours) will it take to cover x distance before repairing?

Select the odd word/letters/number/number pair from the given alternatives.

A solid sphere of radius 3 cm is melted to form a hollow right circular cylindrical tube of length 4 cm and external radius 5 cm. The thickness of the tube is

If a+1b= b+1c = c+1a (a , b, c are not equal) then the value of abc = 

If θ is positive acute angle and 7cos2Ɵ + 3sin2Ɵ = 4, then the value of θ is