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Thread: Playing with Math...

  1. #1
    Gold Member Dave S's Avatar
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    Playing with Math...

    These are old, but they are still fun for those that have not seen them before.

    1. Three guys go out for a bite to eat, they each have R10. The bill comes to R25 and each fella hands his R10 to the waiter. On his way back to the table with the R5 change the waiter thinks, "R5 does not divide easily into three, I will put R2 in my pocket", he does this and gives each of the fellas R1 change. Here's the calculation:

    Each fella has paid R10(original funds) minus R1(change) = R9(total)
    3(fellas) multiplied by R9 = R27(total paid for meal)
    R27 + R2(waiters pocket tip) = R29
    Where is the missing R1?

    2. If a hunter starts walking Due South from his house for 5Km and shoots a bear, he turns Left 90Deg. and walks a further 5Km, where he shoots another bear. He turns Left 90Deg. and walks a further 5Km and is back at his home.
    Where does he live?
    What colour are the bears?

    More to follow...
    Today Defines Tomorrow
    Errare Humanum Est Remitto Divinus

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    Gold Member vieome's Avatar
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    R25 for bill 3R change each balance 2R waiter took, but I liked it.

    No wonder I'm so tired, I've been blaming it on age, poor blood,lack of vitamins, air pollution, saccharin, obesity, dieting, and other maladies that make you wonder if life, really is worth living. But I
    found out it ain't that. I'm tired because I'm over-worked.

    1. The population of this country is 4 million.
    2. 1 million are retired.
    3. That leaves 3 million to do the work.
    4. There are 1 million in school and college.
    5. That leaves 2 million to do the work.
    6. 250,000 are unemployed and 750,000 are employed by the Government.
    7. That leaves 1 million to do the work.
    8. 200,000 are in the armed forces, Aer Rianta and Aer Lingus,leaving 800,000 to do the work.
    9. 200,000 are employed by the county council leaving 600,000 to do the work.
    10. There are 420,000 people in hospital and 179,998 in prison.
    11. That leaves 2 people to do the work.

    You and me.

    And you're sitting on your azz reading this, and that leaves me to do all the work.

    No wonder I'm so tired!!

  3. #3
    Gold Member Dave S's Avatar
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    Yep, and I was the only one working while you were writing... No wonder all I can do now is read...
    Today Defines Tomorrow
    Errare Humanum Est Remitto Divinus

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    Email problem Phil Cooper's Avatar
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    North Pole - White bears

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    Gold Member Dave S's Avatar
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    And here's one that needs a little thought, also quite old, but a good test of one's observation based on the facts to hand.

    An electric train leaves JHB at 60Kms/hour headed for Cape Town, at the same time a Diesel train leaves CapeTown at 40Km/hour headed for JHB, at the point where the train locomotives intersect, which train is furthest from JHB?
    Today Defines Tomorrow
    Errare Humanum Est Remitto Divinus

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    Gold Member Dave S's Avatar
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    Quote Originally Posted by Phil Cooper View Post
    North Pole - White bears
    We have a winner...
    Today Defines Tomorrow
    Errare Humanum Est Remitto Divinus

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    Gold Member Dave S's Avatar
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    The R30 meal is just a play on numbers and the way one calculates. The info given that each has paid R9 is, in fact, incorrect if the waiters "tip" is then added, the R9 already includes the R2. So, each has actually paid (R25 div. 3), R8.33333333..., X 3 equals R24.99999999... plus R2, equals R26.999999999..., plus R3.00 (change) equals R29.9999999999999999.., Isn't maths funny? They still haven't got their R30 value.

    Of course the correct calculation would be 3x9=27 plus R3 change, = R30.00 on the nail. (Ignore the waiters R2 tip, it's already included in the R9 calculation).
    Today Defines Tomorrow
    Errare Humanum Est Remitto Divinus

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    CPT==============Eeeeeeeee===============JHB
    CPT======ddddddddddD=====================JHB
    .....................................|<====Same distance ?=====>|

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    Gold Member Dave S's Avatar
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    Quote Originally Posted by SkyWalker42 View Post
    CPT==============Eeeeeeeee==================JHB
    CPT======ddddddddddD========================JHB
    ........................................|<======Sa me distance ?======>|
    Nope, think a little longer... In fact, your "diagram" shows the answer quite graphically. 'tis none but the Diesel train that is furthest.
    Today Defines Tomorrow
    Errare Humanum Est Remitto Divinus

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    Platinum Member pmbguy's Avatar
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    Obviously the CT train it’s going to JHB
    It is not the strongest of the species that survive, nor the most intelligent, but the one most responsive to change. Charles Darwin

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