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oly.surf

  • one year ago

The first digit of a three digit number is one quarter of the second sight. The third digit is one quarter the value of the number formed by the first two digits. The sum of the three digits is 17. What is the number?

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  1. FibonacciChick666
    • one year ago
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    so hint: can you write 4 equations to represent this paragraph?

  2. oly.surf
    • one year ago
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    umm i got some but i dont know if they are correct, lets say the number = abc a=1/4b b=? c=1/4(a+b) a+b+c = 17

  3. FibonacciChick666
    • one year ago
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    ok lets only use 1 variable can you alter your equations to show me that?

  4. FibonacciChick666
    • one year ago
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    the equations are good though

  5. oly.surf
    • one year ago
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    i dont know what u mean by altering the equations to 1 variable sorry

  6. FibonacciChick666
    • one year ago
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    (I just appreciate you trying) so instead of having a, b, c maybe only have b in one big eq

  7. oly.surf
    • one year ago
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    oh okay! 1/4b + 1/4([1/4b]+b) + b = 17 like that?

  8. FibonacciChick666
    • one year ago
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    exactly can you solve for b now?

  9. oly.surf
    • one year ago
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    i cant seem to figure it out :/

  10. FibonacciChick666
    • one year ago
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    ok let's do it together

  11. FibonacciChick666
    • one year ago
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    so I am going to start by distributing the 1/4 in the second term. can you write this step for me?

  12. oly.surf
    • one year ago
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    do u mean 1/4b + 1/4([1/4b]+b)? sorry im a big confused

  13. FibonacciChick666
    • one year ago
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    ok give me a min and ill explain better

  14. oly.surf
    • one year ago
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    okay thankyou so much

  15. FibonacciChick666
    • one year ago
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    http://www.educreations.com/lesson/view/for-oly-surf/7121943/?ref=link this should explain it

  16. FibonacciChick666
    • one year ago
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    did that help?

  17. oly.surf
    • one year ago
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    thankyou yes it did, but when i figured out 25/16b=17, i got b=10.88 is that right?

  18. oly.surf
    • one year ago
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    sorry i just saw the end of the video, what do u mean by plug it in for a and c?

  19. FibonacciChick666
    • one year ago
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    probably I didnt calculate it and by plug it in a mean just (1/4)b=a(first digit) so thats (1/4)(10.88)= bla bla bla

  20. oly.surf
    • one year ago
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    i dont think its right, like my calculations, sorry i just cant get the 3 digit number dont worry if im being complicated i can ask my teacher

  21. FibonacciChick666
    • one year ago
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    ok h/o I'll redo the problem because you're right it doesn't make sense

  22. oly.surf
    • one year ago
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    okay thankyou so much appreciate it

  23. FibonacciChick666
    • one year ago
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    ok I redid it and got the same answer are you sure you copied the problem correctly?

  24. oly.surf
    • one year ago
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    what 3 digit number did u get?

  25. FibonacciChick666
    • one year ago
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    You can't get one, thats the problem lol

  26. oly.surf
    • one year ago
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    yeah haha thought so! one sec il check if i wrote it correctly

  27. FibonacciChick666
    • one year ago
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    if you only took the first digit it would be 213..

  28. oly.surf
    • one year ago
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    but it dosent equal 17 thats the problem

  29. oly.surf
    • one year ago
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    The first digit of a three digit number is one quarter of the second digit. The third digit is one quarter the value of the number formed by the first two digits. The sum of the three digits is 17. What is the number? This was definitely the question

  30. FibonacciChick666
    • one year ago
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    ok well... I think they messed up lol let me try another approach

  31. oly.surf
    • one year ago
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    dont worry if u cant find it thanks for the help anyway

  32. FibonacciChick666
    • one year ago
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    sorry I couldn't get it... I mean that is the answer. I guarantee it but that is so odd

  33. oly.surf
    • one year ago
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    no worries thanks anyway

  34. FibonacciChick666
    • one year ago
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    @Hoa , can you double check this for me please?

  35. FibonacciChick666
    • one year ago
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    @nincompoop can you double check this for me?

  36. nincompoop
    • one year ago
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    xyz x/4=y z=x+y x+y+z = 17 sorry but I didn't use any mathematical methodologies to answer this… I came up with 287

  37. FibonacciChick666
    • one year ago
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    z=1/4(x+y)

  38. nincompoop
    • one year ago
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    not x+y it is 1/4 of xy The third digit is one quarter the value of the number formed by the first two digits. we are not using algebraic operations

  39. nincompoop
    • one year ago
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    1/4 of 28 is 7 our first two digits in 287 is 28

  40. FibonacciChick666
    • one year ago
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    OMG! formed as in put together... I'm such a nitwit usually I read formed as add

  41. nincompoop
    • one year ago
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    I thought I was going to embarrass myself in front of you…. I was sweating bullets (lol's)

  42. FibonacciChick666
    • one year ago
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    lol ha it's cool but i would have never thought of just making a number by putting them together. That works... although it's more of a riddle than a math problem in that case

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