What's my number ???

[Gizmonster]

I'm thinking of a number. The number I'm thinking of is either 10, 20, or 30.
You may ask me one question to which I can either reply, "yes", "no", or, "I don't know".
What one question do you ask me so that you can determine what number I'm thinking of ????
Don't bother asking, "what number are you thinking of", or anything like that, 'cos I can only reply, "yes", "no", or, "I don't know".

[daisya]

Do you come here often?

[sidkid]

Giz, hopefully you have the answer to this which you will be posting soon? I can't believe it has beaten the whole of AB.....

[bednobs]

damn, i have been trying to work it out too and i thought your reply was the answer

[Safiya]

if you halve the numbers are you left with a single digit odd number?

[Safiya]

crap .... i thought that worked and it doesnt....my head is going to explode

[bednobs]

if the answer to that is "no" it could still be either 20 OR 30

[Safiya]

lol i realised after i said it bednobs...... im reporting him for making me think too much ;)

[factor-fiction]

I would ask you:
"I too am thinking of a number. It is greater thanyual to 20. Is my number right?"

[factor-fiction]

Sorry, dodgy keyboard.
That should say:
I would ask you:
"I too am thinking of a number. It is greater than or equal to 20. Is my number right?"

[bednobs]

eh?

[Safiya]

doesnt work factor..i thought similar but if he says yeah greater than or equal to then it could be 20 or 30

[emeritus]

That could be 20 or 30 Factor

[factor-fiction]

Sorry, realised as soon as I'd typed it. ineed another twist to my question

[I.Don No]

I, too, am thinking of a number.......£161m...and why wasn't it me?

[vallaw]

£161m - do they realise they could give £2m to everyone in the land and still have £40m left?

[Psybbo]

is the number greater than 20?

[emmie]

is it the letters in your name

[Psybbo]

Is the number divisible by 3

[Frank97]

That could still be 10 or 20 sibton.

[bednobs]

sibton : Is the number divisible by 3
If the answer is "no" then it could still be 10 or 20