math
posted by CeCe on .
there are two 1's,two 2's,and two 3's.There is one digit between the two 1's, there are two digits between the two 2's, and there are three digits between the two 3's. Holding number cards,can you duplicate this sequence of numbers?

Have you tried labeling six index cards with 1, 2 and 3 and work with arranging (and rearranging) them?