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jump to last post 1-15 of 15 discussions (17 posts)

Can you add these numbers in your head?

  1. PlanksandNails profile image86
    PlanksandNailsposted 5 years ago

    Can you add these numbers in your head?

    Take 1000 and add 40 to it. Now add another 1000 to it.
    Now add 30. And another 1000.
    Now add 20. Now add another 1000. Now add 10.

    What is the total?

  2. Neinahpets profile image86
    Neinahpetsposted 5 years ago

    Doing it in your head tricks you... eventually at the end you're saying 4900 in your head rather than 4090 because you're trying to remember, so you get 5000 in the head.... but that's 900 off.  It's 4100.

    Interesting brain teaser.

  3. peachpurple profile image83
    peachpurpleposted 5 years ago

    Sorry, i am lousy at maths. I can't even add 25 and 7 properly. Usually uses my fingers to count them. ANyway, with the calculator, the answer is 4100. Definitely the best solution.

  4. wqaindia profile image47
    wqaindiaposted 5 years ago

    I added another 1000 by mistake and it came out to be 5100.

  5. josephbarrett profile image59
    josephbarrettposted 5 years ago

    The total is 4100. It is a good question to get confuse anybody, at the 3rd 1000 i really got confuse but adding carefully, i got the right answer. smile

  6. profile image0
    JThomp42posted 5 years ago

    The total sum of these numbers would be 4100.

  7. joanwz profile image73
    joanwzposted 5 years ago

    The total is 4,100  easy, though I'm not normally a math person.

  8. cjpooja26 profile image63
    cjpooja26posted 5 years ago

    Yes its a brain teaser and I counted 5000 but after adding 4 times 1000 and then adding the rest the I found the correct answer that is 4100

  9. pradiiphira profile image71
    pradiiphiraposted 5 years ago

    Its very simple.
    I solved in just ine try its 4100.
    Isn't it?

  10. blessedp profile image80
    blessedpposted 5 years ago

    I got 4100 after adding it twice.  In my first attempt I got 5100.

  11. duffsmom profile image60
    duffsmomposted 5 years ago

    I usually do this kind of math in my head easily but I admit, I fell prey to the trick and my brain said 5000 at first.

  12. Little Grandmommy profile image60
    Little Grandmommyposted 5 years ago

    The answer is 4,100.  I love math.  It has always been one of my favorite things.  I love math problems and teasers too.

  13. kenyanXstian profile image79
    kenyanXstianposted 5 years ago

    Its five K (5000) quite easy. Wait a minute,no that's 4100, there are only 1000 * 4 = 4000 + 100. That is tricky

  14. reddview profile image79
    reddviewposted 5 years ago

    i like you PlanksandNails but this one had mischief written all over it...... so i chose 4100 smile

  15. Caleb DRC profile image80
    Caleb DRCposted 5 years ago

    OK Planks; I smell a trap. The commutative law of addition says the answer is 4,100, but there be a trap here. So I be taking another route. I think the first 1000 is a negative because you say take, like take away. The first and second 1000 cancel. We can add the 40 and 30, but you do not specifically say what to do with the 3rd 1000. I will assume add. Now we have 1070.  You do not say to add the other numbers to each other but I assume we can; therefore, we have 1070+1030=2,100. I doubt if I'm right here because I think it is deeper than this, but give others time to come up with the right answer. I'll be watching.

    1. PlanksandNails profile image86
      PlanksandNailsposted 5 years agoin reply to this

      You are the first to delve deeper, which means a clue. If you TAKE something and add to IT, what is ADDED becomes a part of IT.  Apart from IT, ADD. What is TAKEN and ADDED to IT, and what is ADDED, is the total.

    2. Caleb DRC profile image80
      Caleb DRCposted 5 years agoin reply to this

      --2,040 + 2060 = 20 ?

 
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