Tricky Umbrella Question Stumps Scottish Students

Some Scottish students felt the National 5 Maths Exam was too difficult, particularly this tricky umbrella question. The test is not yet released, so I have re-constructed the problem as best as I could from accounts of the exam. Here is the problem: “Can an umbrella 85 cm long fit diagonally inside a locker with length 40 cm, width 40 cm, and height 70 cm?”

My blog post for this video

Source: The Scottish Sun

Thanks to Max Krass finding a mistake in the early access version:

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  • There is an equation for the diagonal of cuboid…
    Diagonal=whole root of sum of squares of sides

    Rohan JS
    Posted July 30, 2020
  • Its not the sqrt of 8100 it the sqrt of 8092.25

    Posted July 30, 2020
  • I used the pythagorean theorem but somehow got the wrong answer
    edit: I forgot to square the √ (40²+40²) which is the length of the bottom side's diagonal line 🙂

    Paul Denino
    Posted July 30, 2020
  • This is the easiest one.

    Akash Halder
    Posted July 30, 2020
  • It was much easy

    saumy sharan
    Posted July 30, 2020
  • He has used the direct formula for calculating the diagonal of cuboid
    (l^2+b^2+h^2)whole square root.
    It is not a difficult question.
    It is just using the formula

    Posted July 30, 2020
  • Can the umbrella fit?
    Yes or no?

    Ivan Del Rosario Jr.
    Posted July 30, 2020
  • Please tell me that this task was without a calculator to at least count 70 square + 2 x 40 square and take the root of 8100.

    Posted July 30, 2020
  • Did the students really say the exam was too difficult, especially the umbrella question or except the umbrella question?

    Sebastian Simon
    Posted July 30, 2020
  • If the umbrella handle has a radius of more than 5 cm it would not fit into the locker. Is this assumption right on my part?

    David von Platen
    Posted July 30, 2020
  • As a simpleton of course I use pythagoras twice, knowing very well that it is not elegant and that I solve a riddle meant for 12 year olds like a 12 year old.

    Herr Schmidt
    Posted July 30, 2020
  • Too easy for this channel.

    Posted July 30, 2020
  • this video was really a waste of time

    common indian
    Posted July 30, 2020
  • To be precise its 89.99 i Guess!!

    amar kulkarni
    Posted July 30, 2020
  • Yes it will fit because the length of the diagonal of the locker is 90 cm, and the umbrella is 85 cm long. It won't fit if you put it vertically but it should be stored from point P to point M.

    Justin Santos
    Posted July 30, 2020
  • Diagonally

    Davi Ernest
    Posted July 30, 2020
  • If that was a test in my exam I would probably fail it. Not because it is hard, but because I would overthink it and do something crazy…

    Callum C
    Posted July 30, 2020
  • I'm guessing that 90>85.

    Posted July 30, 2020
  • How is this hard???!!!

    Michael Georgievski
    Posted July 30, 2020
  • Got it in less than a second

    Tangent 200
    Posted July 30, 2020
  • In school we learned a formular for the space diagonal of a cuboid which is square-root of lenght square + width square + height square which is basically the same method as your 2nd method

    That's why i found this task to be very easy

    Posted July 30, 2020
  • Its a spatial pythygoras, 3 edges instead of 2 edges in the formula. Where is the problem?

    Posted July 30, 2020
  • Ez

    Kodey Rolston
    Posted July 30, 2020
  • Solved it by watching to the thumbnail: simply using pythagoras you don't even need to do it twoce as doing it once already gives you the answer: yes

    Posted July 30, 2020
  • Solved it with method 2. As for if being too difficult or not, I suppose that depends if students at the level the test was given for have been taught the pythagorean theorem or not. (or distance formula)

    John Galt Line
    Posted July 30, 2020

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