Problem6, problem7

lib/num_fns.py

@@ -1,4 +1,5 @@
 import math
+from functools import *
 
 def isDivBy(num, denom):
     return num % denom == 0
@@ -24,3 +25,6 @@ def sieve(num):
             primes.append(p)
     
     return primes
+
+def prodList(nums):
+    return reduce(lambda x, y: x * y, nums)