Some persons can do a piece of work in 12 days. Two times the number of such persons will do half of the work in 

∆ ABC  is right angle at B. If m∠C = 45⁰ Then find the value of ( cosec A - √3) = ?

What is the highest common factor of 2x³ + x² -x -2 and 3x³- 2x² + x - 2 ? 

A boat rows downstream covers a distance of 20 km in 2 hrs while it covers the same distance upstream in 5 hrs. Then speed of the boat in still water is : 

What least value which should be added to 1812 to make it divisible 7,11 and 14? 

The simple interest on a certain sum of money at the rate of 5 % per annum for 8 years is ₹ 840. Rate of interest for which the same amount of interest can be received on the same sum after 5 years is? 

If the arithmetic means of 3a and 4b is greater than 50, and a is twice b, then the smallest possible integer value of a is: 

If a man were to sell his chair for Rs. 720, he would loss 25 %. To gain 25% he should sell it for__