A ferry can travel twice as fast when empty as when it is full. It travels 20 mile with full load, spends 1 hour for unloading and returns to its original port empty. It took 11 hours to complete the journey. What is the speed when the ferry is empty?

A man left Tk. 5000 to his three sons X, Y and Z. For every Taka X received, Y received Tk. 1.5 and Z received...

Six persons A, B, C, D, E, and F are standing in a circle. B is between F and C; A between E and D. F is in th...

Which number will complete the series 1,3,7,15,31,63------?

If in a certain language PRIVATE is 1234567 and RISK is coded as 2398, how is TRIVETS coded in the language?

If 42.42=k(14+m/50), where K and m are positive integers and m

If (2x-1)2=100, then which one of the following could equal x?