cos(0) =1 or 0!=1
I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.
One of them is 20+20+20.
whats the other way ?
A four digit positive number having all non-zero distinct digits is such that the product of all the digits is least. If the difference of hundreds digit and tens digit is 1. How many possibilities are there of such number?
