Beach Day by Rodger Bliss
October 2022
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Pop Quiz

A grandfather and his grandson have the same birthday date. For six consecutive birthdays the grandfather was a multiple of theĀ grandson’s age. How old were each at the sixth of these birthdays?

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3 guesses to Pop Quiz


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  • Molly

    Yeah, the first year the grandson is 1 and the grandfather is 61

  • Dude

    Great job, Anant.

    Grandfather 66 and grandson 6 is correct.

    Grandfather Grandson
    61 1 (61 = 1 x 61)

    62 2 (62 = 2 x 31)

    63 3 (63 = 3 x 21)

    64 4 (64 = 4 x 16)

    65 5 (65 = 5 x 13)

    66 6 (66 = 6 x 11)
    So on the sixth birthday, they are 66 and 6 respectively

    You are today’s winner.