Identifying the Lighter Coin

The video tutorial explains how to identify a lighter coin among six identical coins using a balance scale in just two weighings. The first weighing involves placing three coins on each side of the scale to determine which group contains the lighter coin. The second weighing involves weighing two coins from the lighter group to identify the lighter coin. The tutorial provides a step-by-step explanation of the process and concludes with encouragement for viewers to try solving the problem themselves.

What is the main objective of the problem discussed in the video?

• To balance all coins equally

• To weigh all coins in one attempt

• To find the heaviest coin among six coins

• To find the lighter coin among six coins

How many coins are placed on each side of the scale during the first weighing?

• Four coins

• Two coins

• Three coins

• One coin

What does it indicate if one side of the scale goes up during the first weighing?

• The coins on that side are heavier

• The coins on that side are lighter

• The scale is broken

• The coins are balanced

What is the next step after identifying the lighter side in the first weighing?

• Add more coins to the lighter side

• Discard the heavier side and focus on the lighter side

• Remove all coins and start over

• Weigh all six coins again

During the second weighing, how many coins are placed on each side of the scale?

• Three coins

• One coin

• Four coins

• Two coins

What does it mean if the scale balances during the second weighing?

• All coins weigh the same

• The scale is malfunctioning

• The lighter coin is the one not on the scale

• The lighter coin is one of the two on the scale

If the scale does not balance during the second weighing, what does it indicate?

• The coins are of equal weight

• The lighter coin is on the side that goes down

• The lighter coin is on the side that goes up

• The scale needs recalibration

How many total weighings are needed to identify the lighter coin?

• Four weighings

• One weighing

• Two weighings

• Three weighings

What is the significance of the second weighing in the process?

• It confirms the weight of all coins

• It is unnecessary

• It identifies the lighter coin among the remaining three

• It balances the scale

What is the key takeaway from the method discussed in the video?

• The lighter coin can be found in one weighing

• The lighter coin can be found in two weighings

• All coins are of equal weight

• The method is not effective