Quantitative Aptitude - Arithmetic Ability Questions

A can do a work in 24 days and B in 40 days. If they work on it together for 10 days, then what fraction of work is left?

The length of diagonal BD of a parallelogram ABCD is 36 cm. P and Q are the centroids of triangle ABC and triangle ADC respectively. What is the length (in cm) of PQ?

If the loss of percent on article is 15%. Then the ratio of the cost price and sell price will be

Mohan earns a profit of 20% on selling a jean at 15% discount on printed price. The ratio of the cost price to printed price of the jean is

If cosx.cosy + sinx.siny = -1 then cosx + cosy is

If x2 – 4x + 1 = 0, then what is the value of x9 + x7 – 194x5 – 194x3?

What is the value of sin(11π/6)?

Find the area (in sq.cm) of a semi-circle of radius 7 cm