You have to buy 5 books of different price so that the price equals to 20.
conditions:
#1: you cant buy book whose price is 0
#2: you cant buy buy books of decimal such as 2.5
Thank you Kashedul for your submission!
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Mind and Math5 guesses to Mind and Math |
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January 19th, 2017 | Category: 
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$1
$2
$3
$4
$10
OR
$2
$3
$4
$5
$6
There are 5 ways to do it:
Prices of 2,3,4,5,6; 1,3,4,5,7; 1,2,4,5,8; 1,2,3,5,9; or 1,2,3,4,10.
$2, $3,, $4, $5 ,$6+$20
In addition to the two ways Taylor suggests, and the three additional ways Max added, you could also use the following two “Brent” combinations:
$1, $2, $3, $6, $8
$1, $2, $4, $6, $7
So full seven set of combinations is:
$1, $2, $3, $4, $10
$1, $2, $3, $5, $9
$1, $2, $3, $6, $8
$1, $2, $4, $5, $8
$1, $2, $4, $6, $7
$1, $3, $4, $5, $7
$2, $3, $4, $5, $6
Taylor you are correct!
The first book price wil be 1, second book price will be 2, 3rd book price will be 4 and 5th book price will be 10