Quantitative Aptitude - Arithmetic Ability Questions

If x - y = -9 and xy = -20, then find x2 + y2 ?

If a+bab=21 ,  then the value of (a-b) is

12 men complete a work in 9 days. After they have worked for 6 days, 6 more men join them. How many days will they take to complete the remaining work?

Daily local train ticket costs Rs 60 and Monthly Pass costs Rs 1566. If I buy the Monthly Pass and travel for 29 days in a month than I save?

If 35% of A is equal to 60% of B, then what is the ratio of A and B?

Two labourers A and B are paid a total of Rs. 1120 per day. If A is paid 180 percent of what is paid to B, how much (in Rs) is B paid?

If (x - 4) (x2 + 4x + 16) = x3 - P, then P is equal to

Speeds of a boat along the current and against the current are 14 km/hr and 7 km/hr respectively. What is the speed of boat (in km/hr) in still water?