Two Pencils
Math brain teasers require computations to solve.
Karin has two pencils. One is a good one, and one is a cheap one. The good pencil cost $1.00 more than the cheap one. Karin spent $1.10 for both pencils. How much did her cheap pencil cost?
Answer
Five cents. The expensive pencil cost $1.05. You may have thought the answer was 10 cents, but that does not meet the requirement of the expensive pencil costing $1.00 MORE than the cheap pencil. If the cheap pencil cost 10 cents, the expensive pencil would only cost 90 cents more.
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Comments
Shawnheyhey123   
Dec 09, 2005
| 1: I'm the first message! YEAH!!!!! 
2: All you need to figure that problem out is common sense.
3: SUPER EASY!!!!!! |
stephiesd
Dec 15, 2005
| there was a problem like this in my algebra book about popcorn costing $1 more than the bag. i was the only person who got it right. i was also the youngest person in the class. |
cms271828
Jan 22, 2006
| These problems are easy and boring, just basic simultaneous equations.
Can someone post some interesting puzzles on here |
TehIgnored
Mar 02, 2006
| what was the calculator for..??
 |
jj_is_cool 
Mar 29, 2006
| if it is math,. there is always a calculator. n nm nhn bhh h hn n hj hm |
calmsavior
Apr 24, 2006
| pretty easy but cool |
spazzyjazzy93 
May 21, 2006
| ha ha that was good 
am i the only one that got this wrong? |
elu93
Nov 07, 2006
| Wow, i acutally got it! I never realized listening in class would come in handy... |
Dishhead5
Dec 17, 2006
| lol lol lol im young... less than 13 and i do 4-unit maths |
redhead_babe15
Dec 29, 2006
| that was easy, but it was good. some people i know would have said 10 cents. |
hersheyugget 
Mar 29, 2007
| easy heres the forula:
let x=cheap pencil
letx+1.00= good pencil
x+(x+1.00)=1.10
2x+1.00=1.10
2x=.10
x=.05 |
hersheyugget
Mar 29, 2007
| *formula |
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