# Mind and Math

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

Thank you Kashedul for your submission!

### 5 guesses to Mind and Math

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• Taylor Mali

\$1
\$2
\$3
\$4
\$10

OR

\$2
\$3
\$4
\$5
\$6

• Max

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.

• Togram

\$2, \$3,, \$4, \$5 ,\$6+\$20

• Brent

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