Question

A list of numbers is made with the pattern: Start with 3, and multiply by 2 each time.

Here is the beginning of the list of numbers: 3, 6, 12, . . .
Explain how you could use "fill down" in a spreadsheet to find the tenth number in this list.

Answer 1

Explanation:

A1 3

A2 =A1*2

this A2 cell we just fill down at least to the 10th line to A10.

A10 then will display the 10th number of the list.

overall, we can see that the 10th number must be

3×2⁹

as the first number is just a constant (the starting value), and each of all the other 9 numbers are multiplying by 2.