Brain Teasers
Brain Teasers Trivia Mentalrobics Games Community
Personal Links
Submit a Teaser
Your Favorites
Your Watchlist
Browse Teasers
All

Cryptography
Group
Language
Letter-Equations
Logic
Logic-Grid
Math
Mystery
Optical-Illusions
Other
Probability
Rebus
Riddle
Science
Series
Situation
Trick
Trivia

Random
Daily Teasers
Search Teasers

Advanced Search
Add to Google Add to del.icio.us

More ways to get Braingle...

Missing Price

Math brain teasers require computations to solve.

 

Puzzle ID:#49348
Fun:*** (2.95)
Difficulty:** (1.12)
Category:Math
Submitted By:firefox99tus******

 

 

 



When I went to the store, I purchased four items. The following shows the cost of three of the items:

$1.50
$3.00
$4.00

The line to the checkout was pretty long, so to quench my boredom I started playing with my pocket calculator while waiting.

I found out, to my surprise, that the four prices of the four items I purchased added to the same number as I got when I multiplied the four prices together.

What was the price of the fourth item?

Open Calculator


Answer

The three prices add to 1.50 + 3.00 + 4.00 = $8.50.

The three prices multiply to 1.50 x 3.00 x 4.00 = $18.00.

You might be able to see that adding another $0.50 will take the total to $9.00, and multiplying by another $0.50 will take the product to $9.00 also, but the answer can also be found using algebra. Let's call the unknown price P:
1.50 + 3.00 + 4.00 + P = 1.50 x 3.00 x 4.00 x P
8.50 + P = 18.00 x P
8.50 = 18.00 x P - P
8.50 = 17.00 x P
8.50/17.00 = P
P = 0.50.

Hide




What Next?

  
  

See another brain teaser just like this one...

Or, just get a random brain teaser

If you become a registered user you can vote on this brain teaser, keep track of
which ones you have seen, and even make your own.

 



Comments

SRB_1807Ain*
Mar 05, 2012

Good one but pretty easy .... keep them coming ...cheers....
addspras**
Mar 27, 2012

like these easy fun ones..keep em coming!
Babe*
May 20, 2012

No comment!
castia123
May 20, 2012

yeah it is easy
HABS2933Aca*
May 20, 2012

Nice and easy, perfect for a Sunday morning
FatHeadAus*
May 21, 2012

Not bad, but not much of a challenge, eh?
edwardfalanaA
Jan 26, 2013

Cool, but not much tasking.
edwardfalanaA
Jan 26, 2013

Cool, but not much tasking.



Back to Top
   



Online Now: 18 users and 547 guests

Copyright © 1999-2014 | Updates | FAQ | RSS | Widgets | Links | Green | Subscribe | Contact | Privacy | Conditions | Advertise

Custom Search





Sign In A Create a free account