Identifying the Lighter Coin

Identifying the Lighter Coin

Assessment

Interactive Video

Mathematics, Science, Fun

5th - 8th Grade

Hard

Created by

Jackson Turner

FREE Resource

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.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

Four coins

Two coins

Three coins

One coin

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

Three coins

One coin

Four coins

Two coins

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

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