Here is the rule:
You may only insert one verb as many times as you wish anywhere in the expression to produce the desired result: 3(%%%%)4 3 3(%**%%*%)4 16 Here is the desired result: 3((***)(***)***)4 429981696 Here is the expression you must modify to generate 42981696: 3(***(***)(***))4 35831808 Linda ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm