Famous facebook riddle test

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This brain teaser became viral on facebook, Its quite easy but toughest at the same time-
6 + 4 = 210
9 + 2 = 711
8 + 5 = 313
5 + 2 = 37
7 + 6 = 113
9 + 8 = 117
10 + 6 = 416
15 + 3 = 1218
?? + ?? = 123

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  • 6 Answer(s)

    12 + 11 = 123

    a + b = (a-b) followed by (a+b)
    Example –
    6+4 = (6-4)(6+4) = (2)(10) = 210

    SreeRoopa Sankararaman Genius Answered on 14th July 2016.
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    12-11=1 and 12+11=23
    therefore,123

    mohitsingh Genius Answered on 24th July 2016.
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    12,11

    begineer Scholar Answered on 17th August 2016.
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    Question is x+y = some number .
    The number is such that last two digits is x+y and the first is x-y

    sandeep Curious Answered on 10th September 2016.
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    12+11= 123

    vipunita15 Guru Answered on 17th January 2017.
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    12+11=123
    i.e.,12-11=1 which is the first digit and 12+11=23, the second digit

    karthi Guru Answered on 2nd December 2017.
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