diff --git a/data-transform.qmd b/data-transform.qmd
index 7b6955b..f44c828 100644
--- a/data-transform.qmd
+++ b/data-transform.qmd
@@ -397,26 +397,21 @@ ggplot(flights, aes(x = dep_sched %% 60)) + geom_histogram(binwidth = 1)
 ggplot(flights, aes(x = air_time - airtime2)) + geom_histogram()
 ```
 
-1.  Compare `air_time` with `arr_time - dep_time`.
-    What do you expect to see?
-    What do you see?
-    What do you need to do to fix it?
-
-2.  Compare `dep_time`, `sched_dep_time`, and `dep_delay`.
+1.  Compare `dep_time`, `sched_dep_time`, and `dep_delay`.
     How would you expect those three numbers to be related?
 
-3.  Brainstorm as many ways as possible to select `dep_time`, `dep_delay`, `arr_time`, and `arr_delay` from `flights`.
+2.  Brainstorm as many ways as possible to select `dep_time`, `dep_delay`, `arr_time`, and `arr_delay` from `flights`.
 
-4.  What happens if you include the name of a variable multiple times in a `select()` call?
+3.  What happens if you include the name of a variable multiple times in a `select()` call?
 
-5.  What does the `any_of()` function do?
+4.  What does the `any_of()` function do?
     Why might it be helpful in conjunction with this vector?
 
     ```{r}
     variables <- c("year", "month", "day", "dep_delay", "arr_delay")
     ```
 
-6.  Does the result of running the following code surprise you?
+5.  Does the result of running the following code surprise you?
     How do the select helpers deal with case by default?
     How can you change that default?