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| Acmlm's Board - I2 Archive - Brain Teasers - Strange Math Riddles |
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JJ64 Boo Level: 45 Posts: 547/919 EXP: 640956 For next: 19208 Since: 05-22-04 From: Green Bay, WI Since last post: 441 days Last activity: 269 days |
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| Yes, Grey leaps into first... Scores 1st. wolfman2000-5 points 1st. Grey-5 points 2nd. NSNick-4 points 4th. Kirby all the way-2 points 4th. Heian-794-2 points 5th. Emptyeye-1 point 6th. Teddylot-0 points Question 20 (1 point)- There are 5 triangles. Classify them by angles. Triangle 1: 3, 4, 5 Triangle 2: 60, 60, 120 Triangle 3: 40, 50, 89 Triangle 4: 20, 99, 101 Triangle 5: 2, 3, 4 |
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NSNick Laidback Admin Level: 85  Posts: 539/3875 EXP: 5895841 For next: 2699 Since: 03-15-04 From: North Side School: OSU Since last post: 9 hours Last activity: 1 hour |
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| 1. Right 2. Obtuse (again, just a line) 3. Obtuse 4. Right 5. Acute |
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JJ64 Boo Level: 45 Posts: 554/919 EXP: 640956 For next: 19208 Since: 05-22-04 From: Green Bay, WI Since last post: 441 days Last activity: 269 days |
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| All of those are right, except number 2. It's another trick, really. | |||
Grey the Stampede Don't mess with powers you don't understand. And yes. That means donuts. Level: 82  Posts: 62/3770 EXP: 5192909 For next: 16318 Since: 06-17-04 From: Kingston, RI, USA, Earth Since last post: 2 hours Last activity: 1 hour |
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Originally posted by JJ64 Is it like a slice of a circle, where the radius is equal (making it isoceles), but the arc length is more than the hypotenuse could be? It'd be possible like that but then it'd be a pretty weird triangle. |
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JJ64 Boo Level: 45 Posts: 557/919 EXP: 640956 For next: 19208 Since: 05-22-04 From: Green Bay, WI Since last post: 441 days Last activity: 269 days |
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| At any cost, NSNick has the most, so I'm giving him the point. Triangles must apply by these inequalities, where a, b, and c are the sides. a+b>c b+c>a a+c>b Scores 1st. wolfman2000-5 points 1st. Grey-5 points 1st. NSNick-5 points 4th. Kirby all the way-2 points 4th. Heian-794-2 points 5th. Emptyeye-1 point 6th. Teddylot-0 points Question 21 (1 point)- A swimming pool has 3 sections. One section is 8 feet both ways, and 2 feet deep. Another is 16 x 14, and 5 feet deep. The last is 3 x 12, and 13 feet deep. Find the volume of the pool. |
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KATW King Yoshi "If you stare at something long enough, it can be funny." Level: 86  Posts: 1051/3959 EXP: 6087979 For next: 54128 Since: 03-15-04 Since last post: 7 hours Last activity: 5 hours |
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| Okay, did the math... is it 1716ft^3? | |||
Slash Dafter Kodondo Level: 38  Posts: 311/584 EXP: 338934 For next: 31513 Since: 04-04-04 From: E. Millinocket, ME Since last post: 9 hours Last activity: 9 hours |
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| 21. 20 cubic feet (edited by Slash Dafter on 06-28-04 10:55 PM) |
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NSNick Laidback Admin Level: 85 Posts: 544/3875 EXP: 5895841 For next: 2699 Since: 03-15-04 From: North Side School: OSU Since last post: 9 hours Last activity: 1 hour |
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| I did say it was just a line. And you could kinda see it as a triangle with angles of 180, 0, and 0. Sorta. Not really, but shhhh.... | |||
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JJ64 Boo Level: 45 Posts: 560/919 EXP: 640956 For next: 19208 Since: 05-22-04 From: Green Bay, WI Since last post: 441 days Last activity: 269 days |
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| And Kirby all the way gets the point... Scores 1st. wolfman2000-5 points 1st. Grey-5 points 1st. NSNick-5 points 4th. Kirby all the way-3 points 5th. Heian-794-2 points 6th. Emptyeye-1 point 7th. Teddylot-0 points 7th. Slash Dafter-0 points Question 22 (1 point)- Name the type of graph each equation makes: (1) y=x |
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Grey the Stampede Don't mess with powers you don't understand. And yes. That means donuts. Level: 82 Posts: 63/3770 EXP: 5192909 For next: 16318 Since: 06-17-04 From: Kingston, RI, USA, Earth Since last post: 2 hours Last activity: 1 hour |
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| 1: A parabola, it's a quadratic equation. 2: A graph with an asymptote at (0,0), with Y approaching negative infinity before 0, and Y falling from positive infinity after zero. 3: A straight line, it's linear. That's stretching it a bit, but it's all I could think of. (edited by Grey on 06-29-04 10:57 AM) |
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JJ64 Boo Level: 45 Posts: 565/919 EXP: 640956 For next: 19208 Since: 05-22-04 From: Green Bay, WI Since last post: 441 days Last activity: 269 days |
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| You could have called number 2 a hyperbola. Anyway, you get the point, Grey. Scores 1st. Grey-6 points 2nd. NSNick-5 points 2nd. wolfman2000-5 points 4th. Kirby all the way-3 points 5th. Heian-794-2 points 6th. Emptyeye-1 point 7th. Teddylot-0 points 7th. Slash Dafter-0 points Question 23 (1 point)- What comes next in the series? 2, 32, 532, 8532, 28532, # |
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RavenX Red Paragoomba Level: 13 Posts: 14/57 EXP: 9533 For next: 734 Since: 06-29-04 From: Rhode Island Since last post: 486 days Last activity: 339 days |
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| 2, 32, 532, 8532, 28532, # 728532 Because: You add 1 higher each time (going from 2 - 3 you go up 1, but then you add 2 to 3 to make 5, add 3 - 5 to make 8 etc.) but then you count 10 as 0 and start over again. 8 + 4 = 12, drop the tens place = 2. |
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kornfan There's a BARB in my EYE! No reregistering, Mr. Permabanned! Level: 38  Posts: 16/622 EXP: 344540 For next: 25907 Since: 06-27-04 From: the middle of fu**ing nowhere... Since last post: 414 days Last activity: 297 days |
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| 456532 I multiplied by 16, than added twenty to the answer. | |||
Heian-794 Red Super Koopa Level: 44 Posts: 175/896 EXP: 611014 For next: 271 Since: 06-01-04 From: Kyoto, Japan Since last post: 21 days Last activity: 10 days |
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| But Disturbed, that relationship doesn't hold for 8532 and 28532. Raven's got it; these aren't numbers but rather strings of digits. | |||
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JJ64 Boo Level: 45 Posts: 571/919 EXP: 640956 For next: 19208 Since: 05-22-04 From: Green Bay, WI Since last post: 441 days Last activity: 269 days |
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| And RavenX gets the point! Scores 1st. Grey-6 points 2nd. NSNick-5 points 2nd. wolfman2000-5 points 4th. Kirby all the way-3 points 5th. Heian-794-2 points 6th. Emptyeye-1 point 6th. RavenX-1 point 7th. Teddylot-0 points 7th. Slash Dafter-0 points Question 24 (1 point)- Car A is riding at 50 MPH against a 20 MPH wind. Car B is riding at 40 MPH with the 20 MPH wind. What is the ratio of the felt winds? Note: For example, what would the wind feel like if you stuck your hand out the window? |
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Heian-794 Red Super Koopa Level: 44 Posts: 176/896 EXP: 611014 For next: 271 Since: 06-01-04 From: Kyoto, Japan Since last post: 21 days Last activity: 10 days |
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| Car A will feel a 70 MPH wind in their faces; Car B will feel a 20 MPH wind. So the ratio is 70/20 or 3.5. (edited by Heian-794 on 06-29-04 03:51 PM) |
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KATW King Yoshi "If you stare at something long enough, it can be funny." Level: 86 Posts: 1079/3959 EXP: 6087979 For next: 54128 Since: 03-15-04 Since last post: 7 hours Last activity: 5 hours |
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| Car is going against, which means the wind is going towards them, so the 50mph the car is moving + 20mph of wind = 70mph. Car B is going with the wind, so they will feel less wind... so 40mph - 20mph = 20mph of wind. The ratio is 70mph:20mph, or in reduced form, 7:2 |
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JJ64 Boo Level: 45 Posts: 577/919 EXP: 640956 For next: 19208 Since: 05-22-04 From: Green Bay, WI Since last post: 441 days Last activity: 269 days |
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| Heian-794 got it first... Scores 1st. Grey-6 points 2nd. NSNick-5 points 2nd. wolfman2000-5 points 4th. Kirby all the way-3 points 4th. Heian-794-3 points 6th. Emptyeye-1 point 6th. RavenX-1 point 7th. Teddylot-0 points 7th. Slash Dafter-0 points The last question of Round 1! Question 25 (1 point)- Assume y |
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Grey the Stampede Don't mess with powers you don't understand. And yes. That means donuts. Level: 82 Posts: 67/3770 EXP: 5192909 For next: 16318 Since: 06-17-04 From: Kingston, RI, USA, Earth Since last post: 2 hours Last activity: 1 hour |
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| If Y = Z.... 2Y > X Y - X < Z Z - X < Y 2Z > X But that's just substitution, I just assumed you meant Y = Z when you typed YZ. |
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JJ64 Boo Level: 45 Posts: 581/919 EXP: 640956 For next: 19208 Since: 05-22-04 From: Green Bay, WI Since last post: 441 days Last activity: 269 days |
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| I actually did mean that, so I'm giving you the point. Scores 1st. Grey-7 points 2nd. NSNick-5 points 2nd. wolfman2000-5 points 4th. Kirby all the way-3 points 4th. Heian-794-3 points 6th. Emptyeye-1 point 6th. RavenX-1 point 7th. Teddylot-0 points 7th. Slash Dafter-0 points Note: Round 2 has started. It's exactly the same as Round 1... Question 26 (1 point)- Assuming it's not a leap year... take the number of calendar days and divide by the number of spinys (on the ranks page, all users), add the number of letters in goldfish, and subtract all of that... by 200. |
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