What are the first 10 digits after the decimal point (technically the hexadecimal point...) when the fraction 1/7 is written in base 16?

Badada Mar 9, 2019

#1**+2 **

"*What are the first 10 digits after the decimal point (technically the hexadecimal point...) when the fraction 1/7 is written in base 16?*"

\(x = \frac{1}{7}\\x_d=0.\overline{142857}\\x_h=0.\overline{249}\)

I'll leave you to work out the other 7 digits!!

Alan Mar 10, 2019

#2**+1 **

Here is another way of doing it:

1/7 =0.142857...........etc.

1- Multiply the above fraction by 16 and subtract the integer part:

16 x 0.142857......... = 2.2857142857142857142857142857143 - 2 =0.28571428..........etc. Keep this 2 and:

2 - Multiply the remaining fraction by 16:

0.2857142857...... x 16=4.571428571428571428571428571 - 4 =0.57142857.............etc. Keep this 4 and:

3- Multiply the remaining fraction by 16:

0.57142857...... x 16 =9.14285714285714285714285714 - 9 =0.142857142...........etc. Keep this 9 and:

4 - List them from top to bottom with a decimal in front:

0.249249249249........As you can see the decimal reverts to 1/7 =0.14285712..........etc. in (3) above.

Guest Mar 10, 2019