Answers for Questions asked on Dec 11, 2011

8. Dad gives you money every day to put in your new piggy bank. Every day he gives double the amount of money he gave the last day.

If you already have 1 cent in the piggy bank and Dad gives you 1 cent the first day, 2 cents the second day, 4 cents the third day and so on, then your piggy bank gets full on the 10th day.

Questions


i) On which day will your piggy bank be half-full?

ii) In addition to Dad's contributions, if Mom also gave you 1 cent the first day, 2 cents the second day, 4 cents the third day and so on, then on which day would your piggy bank be about half-full?

Answers

i) 9th Day
ii) 8th day