Quantitative Aptitude - Arithmetic Ability Questions

If the ratio of marked price and selling price is 11 : 10, then what is the discount percentage?

The co-ordinates of the centroid of a triangle ABC are (1 , -4). What are the co-ordinates of vertex C if co-ordinates of A and B are (3 , -4) and (0 , 5) respectively?

The diameters of two cylinders are in the ratio 3:2 and their volumes are equal. The ratio of their heights is

In triangle PQR, the sides PQ and PR are produced to A and B respectively. The bisectors of ∠AQR and ∠BRQ intersect at point O. If ∠QOR = 50°, then what is the value (in degrees) of ∠QPR?

P and Q can do a project in 20 and 12 days respectively. In how many days can they complete 40% of the project if they work together?

A sump is filled by three tankers with uniform flow. The first two tankers operating simultaneously fill the sump in the same time during which the sump is filled by the third tanker alone. The second tanker fills the sump 5 hours faster than the first tanker and 4 hours slower than the third tanker. The time required by the first tanker is:

Two chords AB and PQ of a circle intersect at D inside a circle. If AD = 4 cm, DB = 6 cm, QD = 3 cm, the length of PQ is equal to

In a week, how many times are the hands of a clock at right angles with each other?