You have 5 jars of pills. Each pill weighs 10 grams, except for
contaminated pills contained in one jar, where each pill weighs 9
grams. Given a scale, how could you tell which jar had the
contaminated pills in just one measurement?
Follow the steps outlined
below:
Step1: Mark the jars with
numbers 1, 2, 3, 4, and 5.
Step2: Take 1 pill from jar
1, take 2 pills from jar 2, take 3 pills from jar 3, take 4 pills
from jar 4 and take 5 pills from jar 5.
Step3: Put all of the jars on
the scale at once and take the measurement.
Step4: Now, subtract the
measurement from 150 (1*10 + 2*10 + 3*10 + 4*10 + 5*10)
Step5:
The result will give you the jar number which has the contaminated
pills.
