diff --git a/arrays_strings/compress/compress_challenge.ipynb b/arrays_strings/compress/compress_challenge.ipynb
index 353cb2c..f04ec41 100644
--- a/arrays_strings/compress/compress_challenge.ipynb
+++ b/arrays_strings/compress/compress_challenge.ipynb
@@ -39,7 +39,7 @@
     "    * Note: Unicode strings could require special handling depending on your language\n",
     "* Is this case sensitive?\n",
     "    * Yes\n",
-    "* Can you use additional data structures?  \n",
+    "* Can we use additional data structures?  \n",
     "    * Yes\n",
     "* Can we assume this fits in memory?\n",
     "    * Yes"
@@ -159,7 +159,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.4.3"
+   "version": "3.5.0"
   }
  },
  "nbformat": 4,
diff --git a/arrays_strings/compress/compress_solution.ipynb b/arrays_strings/compress/compress_solution.ipynb
index 2313e4b..323879d 100644
--- a/arrays_strings/compress/compress_solution.ipynb
+++ b/arrays_strings/compress/compress_solution.ipynb
@@ -38,7 +38,7 @@
     "    * Note: Unicode strings could require special handling depending on your language\n",
     "* Is this case sensitive?\n",
     "    * Yes\n",
-    "* Can you use additional data structures?  \n",
+    "* Can we use additional data structures?  \n",
     "    * Yes\n",
     "* Can we assume this fits in memory?\n",
     "    * Yes"
@@ -196,7 +196,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.4.3"
+   "version": "3.5.0"
   }
  },
  "nbformat": 4,
diff --git a/arrays_strings/compress_alt/better_compress_challenge.ipynb b/arrays_strings/compress_alt/better_compress_challenge.ipynb
index cc170f7..f7e8c18 100644
--- a/arrays_strings/compress_alt/better_compress_challenge.ipynb
+++ b/arrays_strings/compress_alt/better_compress_challenge.ipynb
@@ -37,9 +37,11 @@
     "* Can we assume the string is ASCII?\n",
     "    * Yes\n",
     "    * Note: Unicode strings could require special handling depending on your language\n",
-    "* Can you use additional data structures?  \n",
-    "    * Yes\n",
     "* Is this case sensitive?\n",
+    "    * Yes\n",
+    "* Can we use additional data structures?  \n",
+    "    * Yes\n",
+    "* Can we assume this fits in memory?\n",
     "    * Yes"
    ]
   },
@@ -157,7 +159,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.4.3"
+   "version": "3.5.0"
   }
  },
  "nbformat": 4,
diff --git a/arrays_strings/compress_alt/better_compress_solution.ipynb b/arrays_strings/compress_alt/better_compress_solution.ipynb
index d5b472f..8efd9a7 100644
--- a/arrays_strings/compress_alt/better_compress_solution.ipynb
+++ b/arrays_strings/compress_alt/better_compress_solution.ipynb
@@ -36,9 +36,11 @@
     "* Can we assume the string is ASCII?\n",
     "    * Yes\n",
     "    * Note: Unicode strings could require special handling depending on your language\n",
-    "* Can you use additional data structures?  \n",
-    "    * Yes\n",
     "* Is this case sensitive?\n",
+    "    * Yes\n",
+    "* Can we use additional data structures?  \n",
+    "    * Yes\n",
+    "* Can we assume this fits in memory?\n",
     "    * Yes"
    ]
   },
@@ -245,7 +247,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.4.3"
+   "version": "3.5.0"
   }
  },
  "nbformat": 4,
diff --git a/arrays_strings/reverse_string/reverse_string_challenge.ipynb b/arrays_strings/reverse_string/reverse_string_challenge.ipynb
index a647021..f63bdd9 100644
--- a/arrays_strings/reverse_string/reverse_string_challenge.ipynb
+++ b/arrays_strings/reverse_string/reverse_string_challenge.ipynb
@@ -34,12 +34,12 @@
    "source": [
     "## Constraints\n",
     "\n",
-    "* Can I assume the string is ASCII?\n",
+    "* Can we assume the string is ASCII?\n",
     "    * Yes\n",
     "    * Note: Unicode strings could require special handling depending on your language\n",
     "* Since we need to do this in-place, it seems we cannot use the slice operator or the reversed function?\n",
     "    * Correct\n",
-    "* Since Python string are immutable, can I use a list of characters instead?\n",
+    "* Since Python string are immutable, can we use a list of characters instead?\n",
     "    * Yes"
    ]
   },
@@ -164,7 +164,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.4.3"
+   "version": "3.5.0"
   }
  },
  "nbformat": 4,
diff --git a/arrays_strings/reverse_string/reverse_string_solution.ipynb b/arrays_strings/reverse_string/reverse_string_solution.ipynb
index f8e13c0..110ae48 100644
--- a/arrays_strings/reverse_string/reverse_string_solution.ipynb
+++ b/arrays_strings/reverse_string/reverse_string_solution.ipynb
@@ -36,12 +36,12 @@
    "source": [
     "## Constraints\n",
     "\n",
-    "* Can I assume the string is ASCII?\n",
+    "* Can we assume the string is ASCII?\n",
     "    * Yes\n",
     "    * Note: Unicode strings could require special handling depending on your language\n",
     "* Since we need to do this in-place, it seems we cannot use the slice operator or the reversed function?\n",
     "    * Correct\n",
-    "* Since Python string are immutable, can I use a list of characters instead?\n",
+    "* Since Python string are immutable, can we use a list of characters instead?\n",
     "    * Yes"
    ]
   },
@@ -303,7 +303,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.4.3"
+   "version": "3.5.0"
   }
  },
  "nbformat": 4,
diff --git a/arrays_strings/rotation/rotation_challenge.ipynb b/arrays_strings/rotation/rotation_challenge.ipynb
index 3599298..4273410 100644
--- a/arrays_strings/rotation/rotation_challenge.ipynb
+++ b/arrays_strings/rotation/rotation_challenge.ipynb
@@ -34,12 +34,14 @@
    "source": [
     "## Constraints\n",
     "\n",
-    "* Can you assume the string is ASCII?\n",
+    "* Can we assume the string is ASCII?\n",
     "    * Yes\n",
     "    * Note: Unicode strings could require special handling depending on your language\n",
-    "* Can you use additional data structures?  \n",
-    "    * Yes\n",
     "* Is this case sensitive?\n",
+    "    * Yes\n",
+    "* Can we use additional data structures?  \n",
+    "    * Yes\n",
+    "* Can we assume this fits in memory?\n",
     "    * Yes"
    ]
   },
@@ -151,21 +153,21 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 2",
+   "display_name": "Python 3",
    "language": "python",
-   "name": "python2"
+   "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {
     "name": "ipython",
-    "version": 2
+    "version": 3
    },
    "file_extension": ".py",
    "mimetype": "text/x-python",
    "name": "python",
    "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython2",
-   "version": "2.7.10"
+   "pygments_lexer": "ipython3",
+   "version": "3.5.0"
   }
  },
  "nbformat": 4,
diff --git a/arrays_strings/rotation/rotation_solution.ipynb b/arrays_strings/rotation/rotation_solution.ipynb
index f354e4f..b37a530 100644
--- a/arrays_strings/rotation/rotation_solution.ipynb
+++ b/arrays_strings/rotation/rotation_solution.ipynb
@@ -34,12 +34,14 @@
    "source": [
     "## Constraints\n",
     "\n",
-    "* Can you assume the string is ASCII?\n",
+    "* Can we assume the string is ASCII?\n",
     "    * Yes\n",
     "    * Note: Unicode strings could require special handling depending on your language\n",
-    "* Can you use additional data structures?  \n",
-    "    * Yes\n",
     "* Is this case sensitive?\n",
+    "    * Yes\n",
+    "* Can we use additional data structures?  \n",
+    "    * Yes\n",
+    "* Can we assume this fits in memory?\n",
     "    * Yes"
    ]
   },
@@ -185,7 +187,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.4.3"
+   "version": "3.5.0"
   }
  },
  "nbformat": 4,
diff --git a/linked_lists/add_reverse/add_reverse_challenge.ipynb b/linked_lists/add_reverse/add_reverse_challenge.ipynb
index 5c9a8f0..7e9c74c 100644
--- a/linked_lists/add_reverse/add_reverse_challenge.ipynb
+++ b/linked_lists/add_reverse/add_reverse_challenge.ipynb
@@ -34,7 +34,7 @@
    "source": [
     "## Constraints\n",
     "\n",
-    "* Do you expect the return to be in reverse order too?\n",
+    "* Do we expect the return to be in reverse order too?\n",
     "    * Yes\n",
     "* What if one of the inputs is None?\n",
     "    * Return None for an invalid operation\n",
@@ -190,21 +190,21 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 2",
+   "display_name": "Python 3",
    "language": "python",
-   "name": "python2"
+   "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {
     "name": "ipython",
-    "version": 2
+    "version": 3
    },
    "file_extension": ".py",
    "mimetype": "text/x-python",
    "name": "python",
    "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython2",
-   "version": "2.7.10"
+   "pygments_lexer": "ipython3",
+   "version": "3.5.0"
   }
  },
  "nbformat": 4,
diff --git a/linked_lists/add_reverse/add_reverse_solution.ipynb b/linked_lists/add_reverse/add_reverse_solution.ipynb
index 1d47753..e6a3502 100644
--- a/linked_lists/add_reverse/add_reverse_solution.ipynb
+++ b/linked_lists/add_reverse/add_reverse_solution.ipynb
@@ -33,7 +33,7 @@
    "source": [
     "## Constraints\n",
     "\n",
-    "* Do you expect the return to be in reverse order too?\n",
+    "* Do we expect the return to be in reverse order too?\n",
     "    * Yes\n",
     "* What if one of the inputs is None?\n",
     "    * Return None for an invalid operation\n",
@@ -256,7 +256,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.4.3"
+   "version": "3.5.0"
   }
  },
  "nbformat": 4,
diff --git a/linked_lists/partition/partition_challenge.ipynb b/linked_lists/partition/partition_challenge.ipynb
index eb9cd72..336d211 100644
--- a/linked_lists/partition/partition_challenge.ipynb
+++ b/linked_lists/partition/partition_challenge.ipynb
@@ -34,13 +34,15 @@
    "source": [
     "## Constraints\n",
     "\n",
-    "* Can we create additional data structures?\n",
-    "    * Yes\n",
-    "* Do you expect the function to return a new list?\n",
+    "* Do we expect the function to return a new list?\n",
     "    * Yes\n",
     "* Can we assume the input x is valid?\n",
     "    * Yes\n",
     "* Can we assume we already have a linked list class that can be used for this problem?\n",
+    "    * Yes\n",
+    "* Can we create additional data structures?\n",
+    "    * Yes\n",
+    "* Can we assume this fits in memory?\n",
     "    * Yes"
    ]
   },
@@ -190,21 +192,21 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 2",
+   "display_name": "Python 3",
    "language": "python",
-   "name": "python2"
+   "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {
     "name": "ipython",
-    "version": 2
+    "version": 3
    },
    "file_extension": ".py",
    "mimetype": "text/x-python",
    "name": "python",
    "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython2",
-   "version": "2.7.10"
+   "pygments_lexer": "ipython3",
+   "version": "3.5.0"
   }
  },
  "nbformat": 4,
diff --git a/linked_lists/partition/partition_solution.ipynb b/linked_lists/partition/partition_solution.ipynb
index c7b1555..399c0a6 100644
--- a/linked_lists/partition/partition_solution.ipynb
+++ b/linked_lists/partition/partition_solution.ipynb
@@ -33,13 +33,15 @@
    "source": [
     "## Constraints\n",
     "\n",
-    "* Can we create additional data structures?\n",
-    "    * Yes\n",
-    "* Do you expect the function to return a new list?\n",
+    "* Do we expect the function to return a new list?\n",
     "    * Yes\n",
     "* Can we assume the input x is valid?\n",
     "    * Yes\n",
     "* Can we assume we already have a linked list class that can be used for this problem?\n",
+    "    * Yes\n",
+    "* Can we create additional data structures?\n",
+    "    * Yes\n",
+    "* Can we assume this fits in memory?\n",
     "    * Yes"
    ]
   },
@@ -231,21 +233,21 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 2",
+   "display_name": "Python 3",
    "language": "python",
-   "name": "python2"
+   "name": "python3"
   },
   "language_info": {
    "codemirror_mode": {
     "name": "ipython",
-    "version": 2
+    "version": 3
    },
    "file_extension": ".py",
    "mimetype": "text/x-python",
    "name": "python",
    "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython2",
-   "version": "2.7.10"
+   "pygments_lexer": "ipython3",
+   "version": "3.5.0"
   }
  },
  "nbformat": 4,