Quantitative Aptitude - Arithmetic Ability Questions

25% discount is offered on an item. By applying a promo code the customer wins 8% cash back. What is the effective discount?

If the perimeter of a semi-circle is 108 cm, then find its radius (in cm).

If x = √2+1, then the value of x4-1/x4

A can do a work in 36 days and B in 12 days. If they work on it together for 3 days, then what fraction of work is left?

In a class of 66 students there are 33 girls. The average weight of these girls is 61 Kg and average weight of the full class is 66 kgs. What is the average weight of the boys of the class?

If x+1x=-2,then the value of x7+1x7

Find the angular elevation of the sum when the shadow of a 15m long pole is 152meters

To cover a distance of 252 km in 2.5 hours what should be the average speed of the car in meters/second?