Number System lecture -1, সংখ্যা পদ্ধতি লেকচার-১ Decimal Number System Binary Number System Octal Number System Hexadecimal Number System Kajol chandra bhadra lecturer ( Mathematics) FB link: https://www.facebook.com/KCBMATH ফেইজ বুক লিংক: https://www.facebook.com/profile.php?id=100004787238801 FB page link: https://www.facebook.com/KCBMATHEMATICS/ youtube link: https://www.youtube.com/channel/UCiZnN3rICIiHuWuR6DbjXlw instagram link: https://www.instagram.com/kajol_bhadra Twitter link: https://twitter.com/BHADRA77260465 #Number_System #Decimal_Number_System #Binary_Number_System #Octal_Number_System #Hexadecimal_Number_System #KCB_MATH