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Math Fun #1156237
07/07/18 03:50 PM
07/07/18 03:50 PM
Joined: Aug 2000
Posts: 52,940
Upstate NY
Pandora Offline OP
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-1. A woman gave birth to a son when the combined ages of her and her husband was 62. When the
son reached the age his mother was on the day she gave birth, his parents celebrated their 40th wedding anniversary. How old were they when they married, if the mother is 4 years older than the father?

-2. The following words are synonyms for a related set of words. What are the words and their relationship?

Strange, In best condition, Flawless, Smooth, Certain, Pessimistic

-3. A creeper plant is climbing up and around a cylindrical tree trunk in a helical manner. The tree trunk has a height of 600 inches and a circumference of 40 inches. If the creeper covers a vertical distance of 75 inches in one complete twist around the tree trunk, what is the total length of the creeper?

-4. The 8" pizza sells for $ 3.99 at my favorite pizza store. The store claims they have a great deal on the large 12" pizza, which is specially priced at $ 7.18. What is the percent discount the store is offering?



Netflix needs to stop asking if I'm still watching and start asking if I've switched the laundry over yet
Re: Math Fun [Re: Pandora] #1156246
07/07/18 07:28 PM
07/07/18 07:28 PM
Joined: Nov 2000
Posts: 18,719
Ottawa Ontario Canada
CanukDenis Offline
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M=Mother, F=Father, S=Son
M+M-4=62 : M=33, so F=29

Code:
      26      M=33
      22      F=29
              S=0               S=33

------|---7---NOW-------33--------|

Soooooooooo, since 40-33=7: 26 and 22


I'm a man of few words, BUT I use 'em often!!
Re: Math Fun [Re: Pandora] #1156247
07/07/18 07:58 PM
07/07/18 07:58 PM
Joined: Aug 2000
Posts: 52,940
Upstate NY
Pandora Offline OP
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Nicely done, Denis! smile


Netflix needs to stop asking if I'm still watching and start asking if I've switched the laundry over yet
Re: Math Fun [Re: Pandora] #1156250
07/07/18 08:27 PM
07/07/18 08:27 PM
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Minnesota, USA
Sherlock Offline
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2. Classification of numbers:
odd, prime, whole, even, positive, negative


The best math you can learn is how to calculate the future cost of current decisions.
Re: Math Fun [Re: Pandora] #1156260
07/07/18 10:49 PM
07/07/18 10:49 PM
Joined: Aug 2000
Posts: 52,940
Upstate NY
Pandora Offline OP
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I had "perfect" instead of "whole" but they both work. thumbsup grin


Netflix needs to stop asking if I'm still watching and start asking if I've switched the laundry over yet
Re: Math Fun [Re: Pandora] #1156263
07/07/18 10:56 PM
07/07/18 10:56 PM
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Posts: 5,763
Mojave desert, California
CCbomber Offline
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3. The length of the creeper after reaching 75"
in height can be thought of as the hypotenuse of a
right triangle with legs, 40" and 75"

Length = sqrt(40^2 + 75^2) = sqrt(1600+5625) = sqrt (7225) = 85"

To reach a height of 600" the creeper must make
8 full twists. So,

length of creeper = 8(85) = 680 inches

Re: Math Fun [Re: Pandora] #1156278
07/08/18 09:19 AM
07/08/18 09:19 AM
Joined: Aug 2000
Posts: 52,940
Upstate NY
Pandora Offline OP
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Impressive! grin


Netflix needs to stop asking if I'm still watching and start asking if I've switched the laundry over yet
Re: Math Fun [Re: Pandora] #1156301
07/08/18 12:33 PM
07/08/18 12:33 PM
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Posts: 18,719
Ottawa Ontario Canada
CanukDenis Offline
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Originally Posted By: Pandora

4. The 8" pizza sells for $ 3.99 at my favorite pizza store.
The store claims they have a great deal on the large 12" pizza,
which is specially priced at $ 7.18.
What is the percent discount the store is offering?

8" : pi*r^2 = pi*4^2 = 50.3 sq.in.
12": pi*r^2 = pi*6^2 = 113.1 sq.in

If no discount:
50.3 sq.in. = 3.99
113.1 sq.in. = 3.99/50.3 * 113.1 = 8.99

d = discount
8.99/(1+d) = 7.18
8.99 = 7.18 + 7.18d
7.18d = 1.81
d = 1.81/7.18 = .25 (approx.)

So da discount dere, it's 25%


I'm a man of few words, BUT I use 'em often!!
Re: Math Fun [Re: Pandora] #1156314
07/08/18 03:41 PM
07/08/18 03:41 PM
Joined: Aug 2000
Posts: 52,940
Upstate NY
Pandora Offline OP
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Pandora  Offline OP
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Very close, Denis. The discount was taken off the 8.99, not the 7.18 smile


Netflix needs to stop asking if I'm still watching and start asking if I've switched the laundry over yet
Re: Math Fun [Re: Pandora] #1156319
07/08/18 05:45 PM
07/08/18 05:45 PM
Joined: Nov 2000
Posts: 18,719
Ottawa Ontario Canada
CanukDenis Offline
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CanukDenis  Offline
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Whoops: my 8.99/(1+d) should be 8.99*(1+d).
That'll make the discount ~20.2%

I'll go stand in the corner...but bringing my pizza along happydance


I'm a man of few words, BUT I use 'em often!!
Re: Math Fun [Re: Pandora] #1156320
07/08/18 06:53 PM
07/08/18 06:53 PM
Joined: Aug 2000
Posts: 52,940
Upstate NY
Pandora Offline OP
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Pandora  Offline OP
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I'd like 20% of it. wave


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