expand your mind!!!!

salam alaykom wr wb
comme ma chere rayhana a dégà signalé l'importance de pratiquer l'anglais pour la bien maitriser, je vous propose alors un jeu en anglais . wé c comm un jeu : des devinettes en anglais, ça va élargir nos perspectives et nous pousser à stimuler l'exploration des situations plutôt que de d'accepter la solution rapide, et en meme temps ça nous aidera à pratiquer l'anglais entre nous ( jai deja tésté cette methode et j avais bien admiré ses résultats:) )
bon j'éspère que mon idée vous plaira et j'attendrai vos réponse
si vous etes d'accord j lance le jeu

bon la méthode que je propose, c'est ke: je mets une devinette, et on essaie de trouver la solution, on peut la discuter entre nous mais just en anglais, et celui qui trouve la solution le premier ( le plus intelligent;) ) sera gagnant . et je mets après l'explication de la solution si c nécéssaire
alors qu'en pensez vous? j'attends vos réponses!!

good idea. i'm ready

very gooooooooooooooooooooooooood idea
let's go

thank u zohir

Go Fadoua we're waiting for your play

ok so let's start

If you add the age of a man to the age of his wife, the result is 91. He is now twice as old as she was when he was as old as she is now.

How old is the man and his wife?


good luck

what is difficult is to understand the meaning of:He is now twice as old as she was when he was as old as she is now.
so that's my point of view
let's take y:the age of the man now
x:her age now
and z the difference of the ages
ok
we have y-x=z
x+y=91
y=2(x-z)
so we have three equation with three unknowns


we take the third and the first
so y=2(x-y+x)=4x-2y
so 4x=3y
we take the second
so 4x=3(91-x) so we find x=39
so y=91-39=52 Z=13
FINALLY we have the man 52 years twice of the age of his wife (26) when he was her age (26+13=39)
i mean the man is 52
HIS WIFE IS 39

congratulation zineb
veeeeeeeeeeery good

The man is 52 and his wife is 39.

The puzzle refers to the man as once being as old as the wife is "now." This gives you the first important piece of information; the man is older than the wife. Second, you know that the two ages will add up to 91. Third, you know that their difference in age is a constant variable. You can't, however, assume that they are close in age, but they must both be middle aged, otherwise it would be difficult to generate a number as high as 91 under the parameters of the problem.

So, after gathering this information, and some guess and check work, you'd find that the man is now twice the age (52) of her age (26) when he was the age she is now (39).

thanks a lot

A comic solution :
I think that we'll need to put 5 bags in both of the right and the left sides.

If the right side move down, it means that the bag with low quality of gold is in the left side

Then we'll take at the same time one bag from the two sides:
-->If the two sides became equal, it means that the bag with low quality of gold is the bag taken from the left side!
-->Else we take two other bags fron the two sides

how do you find my solution

wa sloooooowly akhoti
wach mdoblin f 1ere année!!!!!
I don't what you are saying!!!
I'm very bad in english!!I can't understand a lot of things that you say
wa 3ta9 asamir

Realy this is a good idea and I'll enjoy myself with it!!
thank you fadoua for your participation

Slowly Is You
Welcome Le Mysterieux to this discussion

u r welcome any time le mysterieux

I'll understand English
I hope that you bring to me a CD for this samir
I was waiting for you all the day
[b]you are unponctual!!!!
Zwina hadi yak?
you don't understand any thing!!!!
I am more power than you in this time!!!!

sorry samir. You may use the scale only one time.

hey enimists
where r u? what's happened?
I'm waiting for your propositions to solve the riddle
don't use math here, just a logical deduction will provide the key to this clever problem:)

an other comic solution
i will take a coin from each bag and weight them
i'll add until i find the 9 grams
finally ,the bag that coin comes from,will be the lowest one

hello enimists:)
oh what's the matter? where are intelligent people?
ok ok there is a girl who have found the solution: Jamila; she is so smart tbarkellah
the solution is: u take one coin mn l first bag, 2 coins from the second bag
3 coins from the third bag....10 coins from the 10th bag
u put all of them on the scale and
u can figure out the rest
very good jamila