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Math problem!! TRICKY!?
While raiding your fridge you look behind the stove and discover a slice of bread covered in mold. Since the mold started growing the area it has covered doubled each day. by the end of the eighth day the entire surface of the bread was covered. when was the bread half covered?
3 Answers
- 10 years agoFavorite Answer
One day before. Look at it like this:
DAY 8 - 1/1 of it is covered
Because it doubles every day, it has to be half of 1/1 on the seventh day
DAY 7 - 1/2 of it is covered
And so on and so forth
DAY 6 1/4
DAY 5 1/8
DAY 4 1/16
DAY 3 1/32
DAY 2 1/64
DAY 1 1/128
- 10 years ago
If the mould takes a day to double its coverage of the surface of the bread, and by the end of day 8 the entire surface was covered (the whole being 'double' half) we know it only took a day to go from half covered to entirely covered) so it must have been the day before the 8th day that the bread was half covered- the end of day 7.
- Anonymous10 years ago
day 7
herp derp math
