For the month of April, John decides to save $1 on the first of the month, $2 on the second of the month, $4 on the third of the month and so on following a geometric progression sequence. How much has John saved by the end of the month of April?

1 Answer
Samuel K.
Oct 31, 2017

$465

Explanation:

Since April has 30 days, there are an even amount of pairs of $31.
How? Since there are 15 pairs of days, the first day and the last day, the second day and the second last day etc., there will always we $31. Since we have 15 pairs of $31, we multiply the two numbers together, and we get an answer of $465

(FYI, Please note that this answer may be wrong, as I am still in Year 7. Please feel free to correct any mistakes that i have made!)

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