diff --git a/intervalset.go b/intervalset.go
index be36c4d..27e5a71 100644
--- a/intervalset.go
+++ b/intervalset.go
@@ -246,19 +246,8 @@ func deleteRange[E Elem[E]](x Set[E], lo, hi E) Set[E] {
 
 // Contains reports whether x contains every element in range [r.Low, r.High).
 func (x Set[E]) Contains(r Interval[E]) bool {
-	return x.ContainsRange(r.Low, r.High)
-}
-
-// ContainsOne reports whether x contains a single element v.
-func (x Set[E]) ContainsOne(v E) bool {
-	i := sort.Search(len(x), func(i int) bool { return x[i].High.Compare(v) > 0 })
-	return i < len(x) && x[i].Low.Compare(v) <= 0
-}
-
-// ContainsRange reports whether x contains every element in range [lo, hi).
-func (x Set[E]) ContainsRange(lo, hi E) bool {
-	i := sort.Search(len(x), func(i int) bool { return x[i].High.Compare(lo) > 0 })
-	return i < len(x) && x[i].Low.Compare(lo) <= 0 && x[i].High.Compare(hi) >= 0 && lo.Compare(hi) < 0
+	i := sort.Search(len(x), func(i int) bool { return x[i].High.Compare(r.Low) > 0 })
+	return i < len(x) && x[i].Low.Compare(r.Low) <= 0 && x[i].High.Compare(r.High) >= 0 && r.Low.Compare(r.High) < 0
 }
 
 // Equal reports whether x is identical to y.
diff --git a/intervalset_test.go b/intervalset_test.go
index e1c7dec..f79c21e 100644
--- a/intervalset_test.go
+++ b/intervalset_test.go
@@ -141,14 +141,14 @@ func TestContains(t *testing.T) {
 	s := Set[E]{{1, 3}, {5, 7}}
 
 	assertions := []bool{
-		s.ContainsOne(0) == false,
-		s.ContainsOne(1) == true,
-		s.ContainsOne(2) == true,
-		s.ContainsOne(3) == false,
-		s.ContainsOne(4) == false,
-		s.ContainsOne(5) == true,
-		s.ContainsOne(6) == true,
-		s.ContainsOne(7) == false,
+		s.Contains(One[E](0)) == false,
+		s.Contains(One[E](1)) == true,
+		s.Contains(One[E](2)) == true,
+		s.Contains(One[E](3)) == false,
+		s.Contains(One[E](4)) == false,
+		s.Contains(One[E](5)) == true,
+		s.Contains(One[E](6)) == true,
+		s.Contains(One[E](7)) == false,
 		s.Contains(Range[E](1, 3)) == true,
 		s.Contains(Range[E](3, 5)) == false,
 		s.Contains(Range[E](5, 7)) == true,