Brain Teasers
Oranges
Joe bought a bag of oranges on Monday, and ate a third of them. On Tuesday he ate half of the remaining oranges. On Wednesday he looked in the bag to find he only had two oranges left. How many oranges were originally in the bag?
Answer
He had 6 oranges to start with, and ate 2 the first day and 2 the second day.Hide Answer Show Answer
What Next?
View a Similar Brain Teaser...
If you become a registered user you can vote on this brain teaser, keep track of which ones you have seen, and even make your own.
Solve a Puzzle
Comments
...ate a third of them.
...ate half of the remaining oranges
...two oranges left.
o - (o/3) - [(o - o/3)/2] = 2
o - 2(o/3) = 2
o - 2o/3 = 2
o/3 = 2
o = 6
...ate half of the remaining oranges
...two oranges left.
o - (o/3) - [(o - o/3)/2] = 2
o - 2(o/3) = 2
o - 2o/3 = 2
o/3 = 2
o = 6
Dosn't 12 work as well???
12/3=4
4/2=2
answer=6 OR 12
12/3=4
4/2=2
answer=6 OR 12
Yes. I also got 12.
Actually 12 doesn't work now that I see it. 1/3 of 12 = 4. He ATE a third. 12 - 4 = 8.
I got 12.
12 will not work as that will leave 4 oranges on wednesday : here's how
Assuming there were 12 to start with
Monday, he ate 1/3 i.e 4 leaving 8
Tuesday he ate half of remaining, i.e 4 and leaving 4 for wednesday.
however the teaser clearly says that there were only 2 on Wednesday
Assuming there were 12 to start with
Monday, he ate 1/3 i.e 4 leaving 8
Tuesday he ate half of remaining, i.e 4 and leaving 4 for wednesday.
however the teaser clearly says that there were only 2 on Wednesday
i'm just bactracking to the teasers i missed.
it did the reverse thingy...
wednesday= 2
tuesday he ate half so it's 4.
monday he ate 1/3...so what was left on tuesday is 2/3.
4 is 2/3 of x.
4= (2/3) x
4= 2x/3
4*3=2x
12=2x
12/2=x
x= 6
it did the reverse thingy...
wednesday= 2
tuesday he ate half so it's 4.
monday he ate 1/3...so what was left on tuesday is 2/3.
4 is 2/3 of x.
4= (2/3) x
4= 2x/3
4*3=2x
12=2x
12/2=x
x= 6
To post a comment, please create an account and sign in.
Follow Braingle!