13
Problems(2)
Q13 - Hanoi Open Mathematical Olympiad 2012 - Junior Section
Source:
6/10/2012
Q13. Determine the greatest value of the sum , where are non negative integers satisfying condition
determine the value a-b-c+d
Source:
1/24/2016
A cube with sides of length 3cm is painted red
and then cut into 3 x 3 x 3 = 27 cubes with sides of length 1cm.
If a denotes the number of small cubes (of 1cm x 1cm x 1cm) that
are not painted at all, b the number painted on one sides, c the
number painted on two sides, and d the number painted on three
sides, determine the value a-b-c+d.