diff --git a/questions.md b/questions.md
index 6a16806..f5e7855 100644
--- a/questions.md
+++ b/questions.md
@@ -21,16 +21,28 @@ The answers to the first two questions are given.
 
 3. 00000001
 
+a & ~a
+
 4. 10000000
 
+a
+
 5. 01010000
 
+b & ~a
+
 6. 00001010
 
+b & a
+
 7. 01010000
 
+b & ~a
+
 8. 10101011
 
+b ^ a 
+
 ## Integer questions
 
 These questions are difficult! Try exploring ideas with `Bits`