diff --git a/sample/trick2013/kinaba/remarks.markdown b/sample/trick2013/kinaba/remarks.markdown
index a454a5f0a1..73a4ea9875 100644
--- a/sample/trick2013/kinaba/remarks.markdown
+++ b/sample/trick2013/kinaba/remarks.markdown
@@ -16,7 +16,7 @@ The program contains each ASCII character from 0x20 ' ' to 0x7e '~' exactly once
 
 ### Internals
 
-The algorthim is the obvious loop "32.upto(126){|x| putc x}".
+The algorithm is the obvious loop "32.upto(126){|x| putc x}".
 
 It is not so hard to transform it to use each character *at most once*. The only slight difficulty comes from the constraint that we cannot "declare and then use" variables, because then the code will contain the variable name twice. This restriction is worked around by the $. global variable, the best friend of Ruby golfers.
 
diff --git a/sample/trick2015/ksk_1/remarks.markdown b/sample/trick2015/ksk_1/remarks.markdown
index b822dc55c8..a0b8bbcdcc 100644
--- a/sample/trick2015/ksk_1/remarks.markdown
+++ b/sample/trick2015/ksk_1/remarks.markdown
@@ -110,7 +110,7 @@ is simply `/=/` and removing a padding `",,,,,"`.  The program no
 longer terminates, though.
 
 
-### Limination
+### Limitation
 
 The implementation requires to manipulate long strings even for some
 small starting numbers.  For example, starting from 1,819, the number