9 Balls Riddle

You must determine which is the odd one out using an old fashioned balance.

9 balls riddle. But the light ball is to small a difference for the hand balance you re in luck the course you re at has a scale but you can only afford to use it 2 times. There are 9 coins all except one are the same weight the odd one is heavier than the rest. A nonstop train leaves moscow for leningrad at 60 mph. Answer to riddle 65.

Select 3 balls and put them into the circles such that the sum of the numbers on them add up to 30. If 9 10 11 is heavy then they contain a heavy ball. One out of 9 otherwise identical balls is overweight. How can you find the heavier ball by using the scale only twice.

How can it be identified after 2 weighings. Place the balls 6 11 and 13 to get a sum of 30. The remaining one is defective and heavier than the rest. How would you identify the heavier ball if you could use a pair of balance scales only twice.

Divide the 9 balls into 3 groups of 3. Weighing 9 balls puzzle solution. If they balance then 9 10 11 12 have the odd ball so weigh 6 7 8 vs 9 10 11 with 3 possible outcomes. Etc a b on scale if a b then c is odd group put ball7 and ball8 on the scale if ball7 ball8 then ball9 is the odd one used the scale only twice.

Make the 9 balls into 3 sets a b and c. Weigh it against any other ball to determine if heavy or light. Weigh a group of 3 balls against another group of 3 then you ll know which group of 3 contains the heavy ball. Rotate ball 9 to make into a 6.

If 6 7 8 vs 9 10 11 balances 12 is the odd ball. You have 9 balls equally big equally heavy except for one which is a little heavier. Now try to solve this on your own solution of 9 balls puzzle the optimal solution for 9 balls puzzle is three weighing s solutions are as follows three weighing s. You have 8 balls numbered 1 3 5 7 9 11 13 and 15.

The balls are also numbered from 1 to 9 iow set a containst balls 1 2 and 3. You also have a two armed scale with which to measure the weight of the balls. There are 9 balls that are identical. Pick 2 groups and use scale to determine which group contains the.

Only one ball is heavier than the rest. You know that out of your 9 golf balls there is one that is lighter than the others. Split the balls into 3 groups with 3 balls each. Pool balls sum of 30.

Pick 2 balls from that group and weigh one against the other. You can use a balance scale to compare weights in order to find which is the defective ball. Compare the weight of two of those groups. This 9 balls puzzle problem is very similar to 8 balls weight puzzle where 8 identical looking balls are given and one of the balls is heavier than rest of the 7 balls.