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Piggy Bank

Math brain teasers require computations to solve.

 

Puzzle ID:#676
Fun:*** (2.17)
Difficulty:** (1.34)
Category:Math
Submitted By:vikass***
Corrected By:Dave

 

 

 



You have stealthily raided your small child's piggy bank. You feel guilty as you count the money. You have the same number of dimes and quarters, totaling exactly $2.45. When you turn honest and put it back, how many of each coin will you need to replace? (Note that your child keeps a record of how much she puts in and in what denomination)

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Comments

Sane**
Feb 17, 2005

You have the same number of dimes and quarters, totaling exactly $2.45.

10(x) + (25)x = 24 500
35x = 24500
x = 700 (/100)

Nice teaser.
phrebh*us*
Jun 27, 2005

Why don't you just look at your child's record of it and give the math a skip?
SPUTNIK2Aus*
Feb 03, 2006

good job!
TehIgnored*us*
Mar 29, 2006

lol...i just used trial and error....i got lucky using 7 the first time....
kayleeskitties*us*
Aug 06, 2006

Wouldn't you just put the same coins back?
Jimbo*au*
Apr 10, 2007

What's a dime?
javaguru*us*
Jan 29, 2009

How does 245/35 = 7 become a teaser? Are there no standards?

And how does 245/35 get rated 2.15 on the fun scale and well over 1 on the difficulty scale?

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