Two numbers have a sum of 21. one number is 7 more than the other . find the numbers

14

Reasoning behind it: If you take 21 and subtract it by 7, you get 14. You can check this answer by doing this:

14+7=21.

Hope this helped!!!

the mistake in the pattern is that :

b. the decimal point was moved one too many place values each time

the correct pattern could be made by :

b. moving the decimal point to the right the same numbers of place values as the exponents