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Tricky Logical Puzzle

Tricky Logical Puzzle - 26 January

I have one of the three numbers: 1, 2 or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number ?


For Solution : Click Here

15 comments:

  1. can you all be multiplied by the number one and still stay the same number?

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  2. Will subtracting 2 from your number give a negative number? P.s 0 is neither negative nor positive.

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  3. if you have 1 in your mind please say yes, if 2 please no, or if 3 please say i dont know :)

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    Replies
    1. Clever. But I think it is not a question :)

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  4. I am thinking of 1 or 2 - is your number bigger than mine?. If 3 the answer is yes, if 1 the answer is no, if 2 the answer is I do not know

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  5. Is it a prime number other than 1???

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  6. Is your number greater than 2? Simple.

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    Replies
    1. In this case he would answer "No" for both 1 or 2, and answer "Yes" for 3. It won't give you the solution if he chose 1 or 2.

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  7. ques can be is the number a prime no.?
    if he says yes->its 3,
    no->2
    dont know->1

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    Replies
    1. 3 is prime, and 2 is also prime. 1 is not a prime number. Your solution isn't working.

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  8. Subtract your number by 2 and divide by zero will give you positive number?
    3 is positive infinity
    2 0/0 indeterminate
    1 will give negitive infinity

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  9. Solution:
    You will ask, I am thinking of a number from 2 and 3. Is the number I am thinking of smaller than or equal to the number you have in your mind?

    Now, if I reply no, then the number is 1.
    If I reply yes, then the number is 3.
    If I reply don't know, then the number is 2.

    'If I reply yes, then number is 3.' The number can also be 2 right ? because if I am thinking 2 or 3, it can still be equal to 2 ( a number i am thinking) ?

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  10. Does the number in your mind come before 2?

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  11. Does the number in your mind come before 2?

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