Counting Quadruplets II (Posted on 2010-09-21)

	Submitted by K Sengupta
Rating: 5.0000 (1 votes)
Solution:	(Hide)
(i) Of the 8855 quadruplets meeting the ordering criteria, 3254 have A*B + C*D > 300, but none have A*B - C*D > 100. If the latter were reversed, however, there'd be 6347 with C*D - A*B > 100. For an explanation, refer to the solution submitted by Charlie in this location.

	Subject	Author	Date
	solution	Charlie	2010-09-21 17:36:38
	precedence / solution	ed bottemiller	2010-09-21 14:05:30