Better Days

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  • Unknown
    Unknown
    edited April 2020 #272
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  • Cornersteady
    Cornersteady Club Member Posts: 14,618
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    edited April 2020 #273

    you're kidding right? a twist in the final line but hardly being a genius?

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    edited April 2020 #274
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  • chasncath
    chasncath Forum Participant Posts: 1,664
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    edited April 2020 #275

    Multiplication first, then addition/subtraction.

    19 ?

  • Cornersteady
    Cornersteady Club Member Posts: 14,618
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    edited April 2020 #276

    OK add one line to make this statement true;

    I0 I0 I0 = 9:50

  • Unknown
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    edited April 2020 #277
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  • moulesy
    moulesy Forum Participant Trusted Posts: 9,412
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    edited April 2020 #278

    The old ones are always the best ones!  👍

  • Cornersteady
    Cornersteady Club Member Posts: 14,618
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    edited April 2020 #279

    well you were as you put it on wink but no it's good just not genius that's all.

    OK sorry, to make amends one just for you.

    You get your electric bike out on a site an cycle at an average speed of 10mph along a straight road. you then turn around and cycle back to the site at an average speed of 20 mph (do you want this in Km/h btw)

    what is your average speed overall?  

  • Cornersteady
    Cornersteady Club Member Posts: 14,618
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    edited April 2020 #280

    now that is goodsmile

  • Cornersteady
    Cornersteady Club Member Posts: 14,618
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    edited April 2020 #281

    This is fun, thanks BB

    230 takeaway 220 divided by 2 

    Believe it or not the answer is 5! 

  • Unknown
    Unknown
    edited April 2020 #282
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    edited April 2020 #283
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  • brue
    brue Forum Participant Posts: 21,176
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    edited April 2020 #284

    Yours fitted into the pictorial theme BB, anything else can be reserved for a maths thread. wink Thanks, I like maths to be fun, it makes me feel like a"genius" when I know I'm not (mathmeticians daughter speaking here. tongue-out)

  • chasncath
    chasncath Forum Participant Posts: 1,664
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    edited April 2020 #285

    Don't believe it!

    multiplication and division before addition and subtraction is the rule so

    230 - (220 / 2) = 120innocent

  • Cornersteady
    Cornersteady Club Member Posts: 14,618
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    edited April 2020 #286

    Ok get a scientific calculator (or tip your phone sideways in calculator mode) look for the ! button then do 5! and see what the answer is smile

  • JVB66
    JVB66 Forum Participant Posts: 22,892
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    edited April 2020 #287

    We did not have maths when i went to schoolsurprised

  • Cornersteady
    Cornersteady Club Member Posts: 14,618
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    edited April 2020 #288

    I will when you work out your average speedsmile

    but as a hint to yours your are solving:

    3x = 21

    2y+x =19

    z+ y + x = 15

    but the final twist is finding x + 2z(y-1)

     

  • Unknown
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    edited April 2020 #289
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  • Unknown
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    edited April 2020 #290
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    edited April 2020 #291
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  • Cornersteady
    Cornersteady Club Member Posts: 14,618
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    edited April 2020 #292

    indeed and it works for any distance, d, as it cancels out when you solve

    average speed = 2d/(d/10+d/20)

    I could say that you wouldn't get full marks in an exam question as you only gave a third to 2 dp, ie 13 and 33 hundredths, when really it is 0.3 recurring, (neither would 13.333 but 13.3333 would have got the mark according to exam board marking rules) but that would be nitpicking to say that so I won't.

    You should retrainsmile

  • Cornersteady
    Cornersteady Club Member Posts: 14,618
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    edited April 2020 #293

    yes, 5! = 5x4x3x2x1 = 120

    If you had five different caravans, sorry motorhomes, and want to know any many ways there are of arranging them in a row then there are 120 different ways of doing it.

  • Unknown
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    edited April 2020 #294
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    edited April 2020 #295
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  • Cornersteady
    Cornersteady Club Member Posts: 14,618
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    edited April 2020 #296

    x=7, y=6, z=2 and final answer is 27

  • Unknown
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    edited April 2020 #297
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  • Cornersteady
    Cornersteady Club Member Posts: 14,618
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    edited April 2020 #298

    some easy ones

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    edited April 2020 #299
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