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Replies

  • Shailaja Tiwari

    Member • Jan 19, 2014

    Rajni Jain
    Have courage to solve?
    If you can, let's see how much time did you take to resolve this.

    2+3=8,
    3+7=27,
    4+5=32,
    5+8=60,
    6+7=72,

    7+8=??

    Solve it?
    answer is 98..
    time taken : 2 minutes 3 sec including typing part
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  • Rajni Jain

    Member • Jan 19, 2014

    Shailaja Tiwari
    answer is 98..
    time taken : 2 minutes 3 sec including typing part
    what about explanation?
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  • Shailaja Tiwari

    Member • Jan 19, 2014

    Rajni Jain
    what about explanation?
    actually I left the explanation part so as not to spoil the sport for other members who would try to solve the question.....
    anyway ,if it's expected then here's it

    1*2+2*3=8
    2*3+3*7=27
    3*4+4*5=32
    4*5+5*8=60
    5*6+6*7=72

    hence 6*7+7*8=98😎

    since all the nos are in sequence , fisrt operands are multiplied by 1....onwards and then both the operands are multiplied with each other and consequently added together.....👍
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  • Rajni Jain

    Member • Jan 19, 2014

    Shailaja Tiwari
    1*2+2*3=8
    2*3+3*7=27 <----
    3*4+4*5=32
    4*5+5*8=60
    5*6+6*7=72

    hence 6*7+7*8=98😎
    Couldn't understand this '7' ... infect all of the red ones.
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  • Shailaja Tiwari

    Member • Jan 19, 2014

    Rajni Jain
    Couldn't understand this '7' ... infect all of the red ones.
    see it's simple :
    2*3=6
    + 3*7=21
    6+21=27
    is it this that u wanted to know? or probably u might be thinking that the nos marked red aren't in sequential fashion....but that insequentiality is a part of ur challenge...😀
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  • Rajni Jain

    Member • Jan 19, 2014

    Shailaja Tiwari
    see it's simple :
    2*3=6
    + 3*7=21
    6+21=27
    is it what u wanted to know? or probably u might be thinking that the nos marked red aren't in sequential fashion....but that insequentiality is a part of ur challenge...😀
    He He He... Good One.

    Non Sequential numbers.....3, 7, 5, 8, 7...
    what make you think that next non-sequential number should be 8 to make answer as 6*7+7*8=98 ?
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  • Shailaja Tiwari

    Member • Jan 19, 2014

    Rajni Jain
    He He He... Good One.

    Non Sequential numbers.....3, 7, 5, 8, 7...
    what make you think that next non-sequential number should be 8 to make answer as 6*7+7*8=98 ?
    it was there in ur question itself......and knew that it's right ...i had to insert only 6 in the structure ....that's why i have formatted the manually entered numbrs as bold...
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  • Rajni Jain

    Member • Jan 19, 2014

    98 is the correct answer.
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  • Sarathkumar Chandrasekaran

    Member • Jan 19, 2014

    Hi i tried for 20 minutes and failed but my friend found it in five minutes.
    his answer:98
    Explanation :
    1)Add the two numbers
    2)Multiply the answer with first digit and subtract the same digit to answer.
    example :2+3=8
    1)2+3=5
    2)5*2=10
    3)10-2=8
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  • Midhun Mohan

    Member • Feb 22, 2014

    2 min 10 sec
    answer is 98...
    i found answer by the following,
    (2*3)+(2*1)=8
    (3*7)+(3*2)=27
    (4*5)+(4*3)=32
    (5*8)+(5*4)=60
    (6*7)+(6*5)=72
    here 1,2,3,4..etc are the order of equations
    so
    7+8=(7*8)+(7*6)=98
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