You have 12 coins, one of which is fake. The fake coin is indistinguishable from the rest except that it is heavier. Can you determine which is the real coin heavier using a balance scale and only 3 weighings?

Question

ynehbinuya ynehbinuya

03-04-2018
Mathematics

contestada

You have 12 coins, one of which is fake. The fake coin is indistinguishable from the rest except that it is heavier. Can you determine which is the real coin heavier using a balance scale and only 3 weighings?

Respuesta :

Otras preguntas

Help me with this radius and area work

Who needs pts. Look for my next question... ill be giving a free 100pts

Midyear on July 31st, the Baldwin Corporation's balance sheet reported: Total Liabilities of $51.179 million Cash of $4.020 million Total Assets of $83.522 mill

Which of the following is most likely the next step in the series

Dissociation is thought to be a person's way of dealing with extreme stress by A. experiencing a panic attack. B. focusing and expanding upon negative experienc

Which statement best describes the ruling structure of ancient athens?

why were the hapsburg forced to compromise with the Hungarians? What was the outcome?

How often do town councils meet.

The blue segment below is a diameter of oo. What is the length of the radius of the circle? O A. 14.8 units 7.42 To B. 3.7 units C. 7.4 units O D. 11.1 units SU

how many milliliters are in a small carton of milk

wolf1728 wolf1728 · Answer 1 · 2018-04-03T06:06:46+02:00

1st weighing)
Get all 12 coins. put 6 in one pan and 6 in the other.
They will NOT balance. Get the 6 coins from the heavier pan.

2nd weighing
Separate these into 3 coins in one pan 3 in the other.
These will NOT balance. Get the 3 coins from the heavier pan.

3rd weighing
Separate these 3 coins by placing one coin in each pan.
Do they balance? If they do, the heavy coin is the one NOT being weighed.
If they don't balance, the heavy coin is in the heavy pan.