January 3, 2012
Problem of the Week
for Tuesday, January 3, 2012
Ted has been given 25 different unmarked weights. He has built a scale that allows him to test five different weights at a time and determine the correct order of the 5 weights, from the heaviest down to the lightest. What is the fewest number of weighings that he needs to guarantee that he can identify the five heaviest weights in the correct order from the original set of 25?