Ram has 128 boxes with him. He has to put atleast 120 oranges in one box and 144 at the most. Find the least number of boxes which will have the same number of oranges

A number exceeds its four seventh by 18. What is the number

If m and n (n > 1) are whole numbers, such that mn = 121, the value of (m – 1)n + 1 is