Quantitative Aptitude - Arithmetic Ability Questions

25% discount is offered on an item. By applying a promo code the customer wins 4% cash back. What is the effective discount?

If each median of an equilateral triangle has a length of 12cm. Then what will be the value of in-radius (in cm) of the equilateral triangle?

If p and q are the roots of the equation x2 –15x + r = 0 and p –q = 1, then what is the value of r ?

A does 60% of a work in 15 days. He then calls B, and they together finish the remaining work in 5 days. How long B alone would take to do the whole work?

What is the average of first 19 odd numbers?

What would be the smaller of the two angles formed by the hour hand and the minute hand at 3:47 p.m?

If a-1a=7,then a2+1a2=?

A does 80% of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work?