X's marks are 70, 90, 65, 85 and 75. What marks he must get on the next test to raise her average to 80 ?

A clock loses ( falls behind ) 10 minutes each day. How many days will take to reach a point where the clock w...

What number divided by 50 gives 3.6% ?

Eight telephone poles are each 15 feet apart. What is the distance, in feet, from the first to the last pole ?

A book sells for TK. 65. This price gives the seller a profit 30% on his cost. What will bi the new selling pr...

A TK. 30,000 prize is to be divided among three employees in the ratio of 2:3:5 . What is the value of the sma...

A person has TK. 950 in 29 notes consisting of TK. 500,100, 50 and 10. How many notes should at least be in TK...