MathDB
Problems
Contests
National and Regional Contests
India Contests
Postal Coaching
2005 Postal Coaching
11
11
Part of
2005 Postal Coaching
Problems
(1)
Partitioning
Source: Indian Postal Coaching 2005
9/23/2005
(a) Prove that the set
X
=
(
1
,
2
,
.
.
.
.
100
)
X = (1,2,....100)
X
=
(
1
,
2
,
....100
)
cannot be partitoned into THREE subsets such that two numbers differing by a square belong to different subsets. (b) Prove that
X
X
X
can so be partitioned into
5
5
5
subsets.
number theory unsolved
number theory