The average of 5 quantities is 6 . The average of 3 of them is 8 . What is the average of the remaining two numbers ?

A father is three times as old as his son. After fifteen years the father will be twice as old as his son's ag...

A rectangle is 14 cm long and 10 cm wide . If the length is reduced by x cms and its width is increased also b...

A Zoo keeper counted the heads of the animals in a zoo and found it to be 80. When he counted the legs of the...

When a student weighing 45 dgs left a class , the average weight of the remaining 59 students increased by 200...

If 18 is 15 percent of 30 percent of a certain number , what is the number ?

Average cost of 5 apples and 4 mangoes is 36 taka. The Average cost of 7 apples and 8 mangoes is 48 taka. Find...