Some can’t type numbers using keypad. This because you enabled the Pointer cab be controlled using keypad. To disable it there are two ways.
- By Keyboard
<p>
<b> CTRL + SHIFT + NUM LOCK</b></div>
<div style="text-align: left;">
<ul style="text-align: left;">
<li>
<b>By Terminal</b>
</li>
</ul>
<p>
Command :-
</p>
</div>
<blockquote class="tr_bq">
<p>
gnome-keyboard-properties
</p>
</blockquote>
<div style="text-align: center;">
<u><b>OR</b></u>
</div>
<div style="text-align: left;">
go to <b style="background-color: white; color: #333333; font-family: Arial, Tahoma, Helvetica, FreeSans, sans-serif; font-size: 15px; line-height: 20px;">System ▸ Preferences ▸ Keyboard</b>
</div>
<p>
You will get a window.<br /> Under <b>Mouse Keys </b>tab there is a option called <b>Pointer cab be controlled using keypad</b>.<br /> Uncheck it as shown in the image below.
</p>
<div class="separator" style="clear: both; text-align: center;">
<a href="//4.bp.blogspot.com/-DAekZTlaHRA/UHll83cXVAI/AAAAAAAACAs/5l65kPO3Pxk/s1600/numpad.png" imageanchor="1" style="margin-left: 1em; margin-right: 1em;"><img border="0" src="//4.bp.blogspot.com/-DAekZTlaHRA/UHll83cXVAI/AAAAAAAACAs/5l65kPO3Pxk/s1600/numpad.png" /></a>
</div></div>