What are binary and hexadecimal numbers?

[Joseph Nelmar T. Cardenas]

Sir i was absent on our last discussion or class i don't quite
understand the lesson on the book.
i think i need help.
Joseph Cardenas 6-Rodriguez

[sir macoy]

hi there joseph.
binary numbers are (1,0) there are no other number that would
represent them. now, these binary numbers are what make up data. the
lesson last week was all about converting binary to decimal and
decimal to binary. if you go to the blogspot site we have, i have
posted a simple discussion there. i guess, the pictures can explain
your query.
thanks for asking. just post again if you still have questions