Understanding the Missing Dollar Problem

Understanding the Missing Dollar Problem

Assessment

Interactive Video

Mathematics, English

5th - 8th Grade

Hard

Created by

Ethan Morris

FREE Resource

The video presents a classic math puzzle where three friends buy pizzas for $30, but due to a special offer, the actual cost should be $25. The clerk returns $3 to the friends and keeps $2 as a tip, leading to confusion about a missing dollar. The video explains that the confusion arises from a flawed equation, and clarifies that the $27 paid includes the $25 for pizzas and a $2 tip, resolving the puzzle.

Read more

10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How much did each friend initially pay for the pizzas?

$8

$10

$9

$11

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What was the special offer price for the three pizzas?

$30

$25

$35

$20

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How much money did the clerk keep as a tip?

$4

$3

$2

$1

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the total amount the friends paid after receiving $1 back each?

$24

$25

$26

$27

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How much extra did the friends initially pay before the clerk's adjustment?

$5

$3

$6

$4

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the total amount returned to the friends by the clerk?

$4

$3

$2

$1

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the flaw in the logic that leads to the missing dollar confusion?

The pizzas were overpriced

The tip was added twice in the calculation

The clerk returned too much money

The friends paid too much initially

Create a free account and access millions of resources

Create resources
Host any resource
Get auto-graded reports
or continue with
Microsoft
Apple
Others
By signing up, you agree to our Terms of Service & Privacy Policy
Already have an account?