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A math question on progression

  1. rahul0324 profile image85
    rahul0324posted 5 years ago

    A math question on progression

    A boy starts adding consecutive natural numbers starting from 1. After sometime he reaches a total of 1000 when he realizes he has double counted a number. What is the number he has double counted??

  2. ThoughtSandwiches profile image81
    ThoughtSandwichesposted 5 years ago

    slarb....That's the sound of my head exploding when I tried to figure this out.  As such...my answer is splarb.

    1. rahul0324 profile image85
      rahul0324posted 5 years agoin reply to this

      hahaha... lol.. you will make it thought... try harder big_smile

  3. Aficionada profile image89
    Aficionadaposted 5 years ago

    As far as I can figure, he has double counted the number ten (10).

    1. rahul0324 profile image85
      rahul0324posted 5 years agoin reply to this

      You are right... may I know How did u figure it out smile

    2. Aficionada profile image89
      Aficionadaposted 5 years agoin reply to this

      I wish I had a brilliant mathematical answer, but it's been far too long since I have taken any math! I just did this via the brute, clumsy way of adding numbers. When I reached a total of 990, I knew the only way to reach exactly 1000 was with a 10.

    3. rahul0324 profile image85
      rahul0324posted 5 years agoin reply to this

      Well a correct solution is a correct solution so cheers to that smile

    4. Aficionada profile image89
      Aficionadaposted 5 years agoin reply to this

      Thanks! Here's a little follow-up:  Inspired by the other questions about progressions, I just now worked this using the formula stated elsewhere, and it was very neat! If I practice it enough, I'll learn it well enough to use it (first) next time.

  4. profile image0
    LikaMarieposted 5 years ago

    Oh, I'm worse at these than I am at riddles.

 
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