| style="width:10%; border:none; border-radius:5px;box-shadow: 5px 5px 5px #888888; background:#f9f9ff; vertical-align:middle; text-align:center; " |[https://karnatakaeducation.org.in/KOER/en/index.php/Series_of_Activities_on_Number_Systems Number Systems] | | style="width:10%; border:none; border-radius:5px;box-shadow: 5px 5px 5px #888888; background:#f9f9ff; vertical-align:middle; text-align:center; " |[https://karnatakaeducation.org.in/KOER/en/index.php/Series_of_Activities_on_Number_Systems Number Systems] |