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diff --git a/guide/challenge-bot-questions.org b/guide/challenge-bot-questions.org
index 2f91b9a..b4944dc 100644
--- a/guide/challenge-bot-questions.org
+++ b/guide/challenge-bot-questions.org
@@ -1,3 +1,4 @@
+#+OPTIONS: toc:nil
 * challenge-bot questions
 ** mechanical questions
 *** arduino to deck
@@ -6,7 +7,7 @@
     through.
     we drilled through the arduino into the deck.
     1. what would happen if you used a larger drill bit than the one
-      you used for drilling holes for the arduino?
+      you used when drilling holes through the arduino?
     2. why did we use a drill bit that was wider than the body of the
        bolt used to hold the arduino?
     3. why do people use drill bits that are smaller or the same size as
@@ -29,10 +30,10 @@
     to attach the motor to the deck, first we attached motor mounts.
     the motor mounts are the square things with 6 holes of
     various sizes.
-    1. the bolts used to attach the arduino are 6-32 bolts.
+    1. the bolts used to attach the arduino are =6-32= bolts.
        the bolts used to attach the motor to the motor mount are
-       4-40 bolts.
-       Are the 4-40 bolts fatter or thinner than the 6-32?
+       =4-40= bolts.
+       Are the =4-40= bolts fatter or thinner than the =6-32=?
     2. if you see a bolt described as =4-40x1.25=" how long is it?
     3. on a =4-40= bolt, how many times does the thread wrap around
        one inch of the body?
@@ -56,8 +57,9 @@
     2. what's the difference between stranded and solid core wire?
     3. why are we using solid core wire for plugging into
        the breadboard?
-    4. should the black chip (motor controller) be on the left or the right
-    5. why should the chip be on the right?
+    4. do we have the black chip (motor controller) be on the left or
+       the right of the breadboard?
+    5. why should the chip be on the right on our robot?
 *** batteries
     there are two battery packs on the robot.
     one of them powers the motors, and is in the clear battery pack.
@@ -66,6 +68,8 @@
        (roughly)?
     2. should you pick up a battery by the wires coming out of it?
     3. what are the wires coming out of the battery called?
+    4. why do we put the glue dots on the side of the battery pack
+       without the on/off switch?
 *** caster
     the caster is the solid metal sphere.
     it is held in a 3d printed plastic housing called the caster standoff.
@@ -73,16 +77,14 @@
     1. where is the caster?
     2. why is the caster in the middle of the back, instead of on the
        left or right?
-    3. why do we put the glue dots on the side of the battery pack
-       without the on/off switch?
-    4. what would happen if there were no caster on the back
+    3. what would happen if there were no caster on the back
        of the robot?
 *** tools
     1. do you have a ratcheting socket wrench?
        what is a ratcheting socket wrench?
     2. what is the socket wrench used on?
     3. what are the pliers?
-    4. what do you use to take the colored part off the end of a wire?
+    4. what do you use to remove the colored part from a wire?
 *** misc
     1. what is the robot tread made out of?
     2. why is it difficult to push the sonar into the sonar holder?