How much zeros has the number $1000!$ at the end? If a number ends with n n zeros than it is divisible by 10n 10 n, that is 2n5n 2 n 5 n A factorial clearly has more 2 2 s than 5 5 s in its factorization so you only need to count how many 5 5 s are there in the factorization of 1000! 1000!
What does X% faster mean? - Mathematics Stack Exchange 29 I was reading something today that was talking in terms of 10%, 100% and 1000% faster I assumed that 10% faster means it takes 10% less time (60 seconds down to 54 seconds) If that is correct wouldn't 100% faster mean 0 time and 1000% mean traveling back in time?
Infected Dinner Brainteaser - Mathematics Stack Exchange I came across this brainteaser online that I found quite confusing: There are $1000$ people having dinner at a grand hall One of them is known to be sick, while the other $999$ are healthy Each m
geometry - Maximum area of rectangle with fixed perimeter . . . The result you need is that for a rectangle with a given perimeter the square has the largest area So with a perimeter of 28 feet, you can form a square with sides of 7 feet and area of 49 square feet This follows since given a positive number A A with xy = A x y = A the sum x + y x + y is smallest when x = y = A−−√ x = y = A You have 2x + 2y = P x + y = P 2 2 x + 2 y = P x + y = P