A cyclist cycles 8 km at 15 km/hr and a further 4 km at 20 km/hr. Find the average speed in km/hr. 

If the HCF and LCM of 5x and 8x are 9 and 360 respectively, find value of x. 

If the average marks obtained by Balu, Benjamin and Babur is 80 and the average marks of Benjamin and Babur is 83, find marks obtained by Balu.

Which is the smallest prime number? 

What is the measure of the angle formed by the hour and minute hand when the time to 10' O clock? 

A book can be read in 40 days if 7 pages are read every day. If the book needs to be read in 8 days. How many pages should be read every day? 

If secθ – tanθ = 1/3 what is secθ + tanθ?

The mean of four different observations is 17.5. When a new observation whose value 20 is added, what will be the new mean?