Fix typo

diff --git a/index.html b/index.html
index 2f5ddc0..eccba6c 100644 (file)
--- a/index.html
+++ b/index.html
@@ -211,7 +211,7 @@
     <div id="slide-5">
         <div class="slide-title">=<< Promises >>=</div>
         <div class="slide">
-            <h1>What problem to promises solve?</h1>
+            <h1>What problems do promises solve?</h1>
             <div class="textbox" style="width: 60%; margin: auto; text-align: left;">
                 <ul>
                     <li>Asynchronous request management</li>