perplexus.info :: Just Math : Counting Quadruplets

Counting Quadruplets (Posted on 2010-08-20)

Each of A, B, C and D is a positive integer with the proviso that A ≤ B ≤ C ≤ D ≤ 20.

Determine the total number of quadruplets (A, B, C, D) such that A*B*C*D is divisible by 50.

See The Solution Submitted by K Sengupta

Rating: 5.0000 (1 votes)

Comments: ( You must be logged in to post comments.)

Subject	Author	Date
solution	Dej Mar	2010-08-21 04:36:06
Using Excel . . .	hoodat	2010-08-20 20:41:02
re: wrong Solution	Ady TZIDON	2010-08-20 20:21:16
re: Solution -- ERR0NEOUS	Ady TZIDON	2010-08-20 20:09:33
Solution	hoodat	2010-08-20 19:58:08
re: Solution	ed bottemiller	2010-08-20 19:06:32
Solution	Praneeth	2010-08-20 17:29:13
Agreed	ed bottemiller	2010-08-20 16:44:15
CONTINUE MY COUNTING	Ady TZIDON	2010-08-20 14:38:49
counting on line - a starter	Ady TZIDON	2010-08-20 14:09:20
some thoughts; then computer solution (spoiler)	Charlie	2010-08-20 13:56:11

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