How could you find which jar had the contaminated pills in just one measurement?

Question

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 find which jar had the contaminated pills in just one measurement?

Answer 1

NUMBER THE JARS 1,2,3,4,5.
NOW TAKE 1 PILL FROM 1ST JAR
AND TAKE 2 PILLS FROM 2ND JAR
TAKE 3 PILLS FROM 3RD JAR
TAKE 4 PILLS FROM 4TH JAR
TAKE 5 PILLS FROM 5TH JAR
MEASURE THE WEIGHT OF ABOVE 15 PILLS
THE WEIGHT SHOULD BE 150 GRAMS IF EACH ONE IS 10 GRAMS
SO SUBTRACT THE WEIGHT OF 15 PILLS FROM 150
HOW MUCH YOU WILL GET IS THE NUMBER OF THE BOX CONTAINING CONTAMINATED PILLS