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.

TZIDON - My bad.  I missed the less than OR EQUAL TO sign.  I assumed that integers could not equal each other.

Using Excel, I come up with 1570.  I will retry the Statistics method later.

Edited on August 20, 2010, 8:44 pm

Posted by hoodat on 2010-08-20 20:41:02