hi............i need a big help in maths it's urgent and it's really tricky.....?

Question

Mrs. Pena bought a bag of oranges.She ate one and put the rest in the refrigerator,ate one orange and used half of those left to make orange juice.An hour later,Mrs Pena's daughter went to refrigerator,ate one orange and used half of those left to make orange juice.When Mrs. Pena later went to the refrigerator,she was shocked to find that there were only two oranges left.How many oranges has Mrs. Pena bought ?

Answer 1

Me too

Answer 2

I get 12 oranges -
Mrs. Pena:
ate 1
ate 1 and 1/2 for juice (?)
Daughter:
ate 1
used 1/2 for juice (?)
2 left over
must have been 4 for daughter to juice half + 1 she ate =5 oranges
Mrs. Pena make juice using half the oranges, 5+5=10
Mrs. Pena ate 2 in the beginning 10+2=12
Hope it's right!!

Answer 3

12

Answer 4

12

Answer 5

Start backwards

2 oranges (2 o)
double
4 o
add 1
5 o
double
10 o
add 1
11 o
add 1
12 o

12 oranges where initially bought.

Answer 6

All right. Start from the end.

2 oranges at the end. Double that to get 4. Add one to get 5. So there were 5 oranges when her daughter came.

Then, double 5 to get 10. Add one to get 11. And another to get 12. That's how many she started with.

12 -> 11 -> 10 -> 5 (juice) -> 4 -> 2(juice)

Answer 7

Work backwards.
2 left double = 4 add one she ate =5 double = 10 +1 she ate =11 + 1 she ate =12.

Answer 8

N = (2*2 + 1)2 + 1 + 1
N = (4 + 1)2 + 2
N = 5*2 + 2
N = 10 + 2
N = 12

Answer 9

12 Would be the answer

Answer 10

18 oranges i had some similar questions like this 2night