diff --git a/src/core/Cool-num.pm b/src/core/Cool-num.pm
index 2f1229eb602..2f0f5bf5edb 100644
--- a/src/core/Cool-num.pm
+++ b/src/core/Cool-num.pm
@@ -67,8 +67,8 @@ augment class Cool {
         ~(pir::chr__SI(self))
     }
 
-    our Num method rand() {
-        pir::box__PN(pir::rand__NN(self))
+    method rand($x:) {
+        (+$x).rand;
     }
 
     method sin($x: $base = Radians) {
@@ -312,8 +312,8 @@ proto chr($graph) {
     $graph.chr;
 }
 
-sub srand(Int $seed = time) {
-    pir::srand__0I($seed);
+proto sub srand($seed) {
+    srand(+$seed);
 }
 
 # vim: ft=perl6
diff --git a/src/core/Num.pm b/src/core/Num.pm
index 24584d57a18..6209064abce 100644
--- a/src/core/Num.pm
+++ b/src/core/Num.pm
@@ -75,6 +75,10 @@ augment class Num does Real {
         }
     }
 
+    method rand(Num $x:) {
+        pir::box__PN(pir::rand__NN($x))
+    }
+
     method sin(Num $x: $base = Radians) {
         pir::sin__Nn($x.to-radians($base));
     }
diff --git a/src/core/Real.pm b/src/core/Real.pm
index 3ac3c421b8e..c98737fb2dd 100644
--- a/src/core/Real.pm
+++ b/src/core/Real.pm
@@ -96,6 +96,10 @@ role Real does Numeric {
                     $mag * $angle.sin(Radians));
     }
 
+    method rand($x:) {
+        $x.Bridge.rand;
+    }
+
     method sin(Real $x: $base = Radians) {
         $x.Bridge.sin($base);
     }
@@ -264,3 +268,7 @@ multi sub infix:<**>(Real $a, Real $b) {
 our multi sub infix:<mod>(Real $a, Real $b) {
     $a - ($a div $b) * $b;
 }
+
+multi sub srand(Real $seed = time) {
+    pir::srand__0I($seed.Int);
+}