Can you make a video for problems with 1011 for example to base 2 and its asking you to convert to base 4? I see those a lot and it gets annoying to skip them every time. If their already is one could you link to in a reply or if its a short explanation can you reply with it. Thank you

The trick is to think of the base four number as multiple base two problems. so for 1011 think of it as 10 and 11. Do each of these in base 2 and write both. So for 1011 base 2 to base think of it as 10 base 2 to base 10 and 11 base 2 to base 10. So 2 and 3 so the answer is 23.

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## Math Rocks

January 5, 2016 at 10:47 pm (UTC 0) Link to this comment

Is there a divisibility rule for dividing by 12 or 7? Thanks.

## anthony gillespey

January 16, 2016 at 3:52 am (UTC 0) Link to this comment

There are 7s more work than its worth. 12 is a lot easier just do divisibility for 4 and 3.

## Random Guy

February 10, 2017 at 3:36 am (UTC 0) Link to this comment

Can you make a video for problems with 1011 for example to base 2 and its asking you to convert to base 4? I see those a lot and it gets annoying to skip them every time. If their already is one could you link to in a reply or if its a short explanation can you reply with it. Thank you

## anthony gillespey

February 20, 2017 at 3:39 pm (UTC 0) Link to this comment

The trick is to think of the base four number as multiple base two problems. so for 1011 think of it as 10 and 11. Do each of these in base 2 and write both. So for 1011 base 2 to base think of it as 10 base 2 to base 10 and 11 base 2 to base 10. So 2 and 3 so the answer is 23.

## anthony gillespey

March 21, 2017 at 10:05 pm (UTC 0) Link to this comment

I can give that look this summer. I am rewriting the book to deal with some of this new stuff.