diff --git a/lua/src/p0004.lua b/lua/src/p0004.lua
index 3dc977a9..41939b15 100644
--- a/lua/src/p0004.lua
+++ b/lua/src/p0004.lua
@@ -18,7 +18,7 @@ return {
                 local p = u * v
                 local ps = tostring(p)
 
-                if ps == ps.reverse() and p > answer
+                if ps == string.reverse(ps) and p > answer
                 then
                     answer = p
                 end
diff --git a/lua/src/p0034.lua b/lua/src/p0034.lua
index f36d4f2e..c026d127 100644
--- a/lua/src/p0034.lua
+++ b/lua/src/p0034.lua
@@ -23,8 +23,7 @@ return {
         do
             local xs = tostring(x)
             local sum = 0
-
-            for i = 1,xs.len(),1
+            for i = 1,len(xs),1
             do
                 sum = sum + factorial(tonumber(xs[i]))
             end
diff --git a/lua/src/p0076.lua b/lua/src/p0076.lua
index e5054788..333097c7 100644
--- a/lua/src/p0076.lua
+++ b/lua/src/p0076.lua
@@ -36,10 +36,9 @@ return {
                 idx = 2
 
                 repeat
+                    counts[idx + 1] = 0  -- please remember lua is 1-indexed
                     idx = idx + 1
-                    counts[idx] = 0  -- please remember lua is 1-indexed
-                    idx = idx + 1
-                    counts[idx] = counts[idx] + idx - 1
+                    counts[idx + 1] = counts[idx + 1] + idx
 
                     for i = (idx - 1),101,1
                     do