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5   25   29   85   89   ?

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    Answer: 145.
    Explanation: Sum of the squares of the digits of the previous number.
    5×5=25
    (2×2)+(5×5)=29
    (2×2)+(9×9)=85
    (8×8)+(5×5)=89
    (8×8)+(9×9)=145

    pnikam Expert Answered on 15th August 2015.
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