Squares and Rectangles (Posted on 2004-01-21)

	Submitted by Ravi Raja
Rating: 2.0000 (5 votes)
Solution:	(Hide)
11550 The Generic solution to this is: Total number of rectangles = (Summation of row numbers) * (Summation of column numbers) Here there are 20 rows and 10 columns or vice versa. Hence, total possible rectangles = ( 20 + 19 + 18 + 17 + 16 + .... + 3 + 2 + 1 ) * ( 10 + 9 +8 + 7 + .... + 3 + 2 + 1) = ( 210 ) * (55) = 11550 Hence, total 11,550 different rectangles are possible.

	Subject	Author	Date
	General Case and Puzzle Solution	K Sengupta	2022-06-17 00:18:34
	Puzzle Answer	K Sengupta	2022-06-17 00:05:58
	re: My answer	chintan	2004-11-14 08:03:12
	re(3): One direction at a time	Jils	2004-01-23 03:34:28
	re: My answer	Richard	2004-01-22 16:59:17
	My answer	Cindy	2004-01-22 16:27:32
	re(2): One direction at a time	Richard	2004-01-22 13:18:40
	re: One direction at a time	Jils	2004-01-22 12:08:15
	One direction at a time	Jils	2004-01-22 12:05:49
	question of form	slothman	2004-01-22 00:23:34
	re: The real deal: 11,550? Mine was a little smaller than that...	Richard	2004-01-21 20:56:15
	The real deal: 11,550? Mine was a little smaller than that...	Benjamin J. Ladd	2004-01-21 18:03:47
	11,550? Mine was a little bigger than that...	Benjamin J. Ladd	2004-01-21 17:30:46
	solution	Dan Porter	2004-01-21 15:47:31
	No Subject	Dan Porter	2004-01-21 15:46:59
	re(2): Nodes	SilverKnight	2004-01-21 11:46:36
	re: Nodes	Sam	2004-01-21 11:40:06
	re: Question	SilverKnight	2004-01-21 11:26:57
	Question	Penny	2004-01-21 10:47:08
	solution	retiarius	2004-01-21 09:45:39
	re: Solution	SilverKnight	2004-01-21 09:35:29
	Solution	Brian Smith	2004-01-21 09:22:00