In how many ways can the letters of the world 'APPLE' be arranged?

If (a-b) is 6 more than (c+d) and (a+b) is less than (c-d) then (a-c) is:

The lest number by which 1470 must be divided to get a number which is a perfect square is:

The average of a non-zero number and its square is 5times the number. The number is-

Three fourth of a number is 60 more than its one-third. The number is:

Eighteen years ago,a father was three time as old as his son.Now the father is only twice as old as his son. T...

A sells an article which cost him Tk. 400 to B at a profit of 20%. B then sells it to C,making a profit of 10%...