Brain Teasers
Math Situations #1
In a coin collecting book 30 nickels can fit in each of 8 pages and 36 dimes can fit on each of 6 pages. If the nickel book is 5/8 full and the dime book is 75% full, how much money is in the book?
Hint
Convert the fraction and percentage to a decimal.Answer
The answer is $23.70.This can be calculated through multiplication.
5/8 is equivalent to .625. The total amount of money that can be stored into the nickel section of the book is $12. 12x.625=7.5, or $7.50.
75% is equivalent to .75. The total amount of money that can be stored in the dime section of the book is $21.60. 21.6x.75=16.2, or $16.20.
If you add these numbers ($7.50 and $16.20) you end up with a sum of $23.70.
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Comments
Boring. You didn't even note that 5/8 of 8 pages is 5 pages - that takes one straight to 5 * 30 = 150 nickels which is $7.50.
Oh, and if each page of 36 slots is 75% full, each has 27 dimes. One can skip calculating total capacity of book and go directly to 27 * 6 = 162 dimes. $16.20.
I'm just showing one way to do it. I can't possibly show all the ways there are.
Shame on those who need the hint.lol
Still fun.
Still fun.
I'm with Stil--boring and not even illustrating the shortcuts. I used both the shortcuts Stil pointed out and it took less than 15 seconds in my head.
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