Quantitative Aptitude - Arithmetic Ability Questions

If Mohan purchase 13 articles for Rs 12 and sells all the articles at the rate of 12 articles for Rs 13, then what will be the profit percentage?

A shopkeeper marks his goods 50% more than the cost price and allows a discount of 25%. His profit or loss percentage is:

ΔABC is right angled at B. If m∠A = 45°, then find the value of (cosecC + 1/√3).

PQ is the chord of a circle whose centre is O. ROS is a line segment originating from a point R on the circle that intersect PQ produced at point S such that QS = OR. If ∠QSR = 30°, then what is the value (in degrees)of POR?

If a:b = 5:8, find the value of (6a -­ 5b)/(a + 2b).

The average height of 40 sticks is 154 cm. Some sticks of average height 160 cm are taken out. If the new average height is 150 cm, then how many sticks are remaining?

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?

A can finish a work in 7 days . B can finish the same work in 9 days . The days required to finish the work by both of them together.