Browsing the archives for the mathematics tag

Trailing Zeros in 100 Factorial

Question: How many zeros are there in 100! (100 factorial)? Answer: For those who don’t know what factorial is, 100! = 100 * 99 * 98 * … * 2 * 1 Ok, let’s look at how trailing zeros are formed in the first place. A trailing zero is formed when a multiple of 5 is multiplied […]


4 Quarts of Water

Question: If you had an infinite supply of water and a 5 quart and 3 quart pails, how would you measure exactly 4 quarts? and What is the least number of steps you need? Update: There is a better solution in the comments section which requires only 6 steps. Answer: This question is very simple […]