MathDB
Problems
Contests
International Contests
Baltic Way
1991 Baltic Way
3
3
Part of
1991 Baltic Way
Problems
(1)
Cats and sacks for sale
Source:
4/19/2013
There are
20
20
20
cats priced from
$
12
\$12
$12
to
$
15
\$15
$15
and
20
20
20
sacks priced from
10
10
10
cents to
$
1
\$1
$1
for sale, all of different prices. Prove that John and Peter can each buy a cat in a sack paying the same amount of money.