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 Post subject: Math Challenge 22
PostPosted: Dec 22, 2005 - 01:24 PM 
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Chủ Trại Dzê
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Okie , mấy bữa nì ngộ bận wá xá wà xa , không dzô tt.net
Bi chừ cho bài dễ nì :

1. Proof :
1 < 2

Multiply the equation by log (0.5)

1 * log(0.5) < 2 * log(0.5)

Make the log factors exponents

log(0.5 ^ 1) < log(0.5 ^ 2)

Carry out the exponentiation

log(0.5) < log(0.25)

Raise 10 to the power of each side of the inequality

10^(log(0.5)) < 10^(log(0.25))

By definition of logarithms, 10^log(a) = a, so...

0.5 < 0.25

Then just multiply both sides by 4

2 < 1

Question:
What is wrong ? dòm bài HaiTac nha

2. Take this equation:

11 - 1111 = 11

Now move 1 line to make it true. Quaivat

3. A fly and a flea are trapped in a flue
said the fly to the flea 'to flee is some number times 3'
Said the flea to the fly 'but 3 squared is too high'
responds the fly 'but it'll also do to have some number times 2'
'Agreed' said the flea 'Then so it shall be'
So now it is up to you.
How far must the fly and the flea fly to flee the flue TayDoi - 6

4. Okie , tiếp theo nì
There is only one 2-digit number that is both a square and a cube. What is it? Umbalabien_ozawachan :64 ( 8*8 or 4 x 4 x 4 )

5. There is only one 3-digit number that is both a square and a cube. What is it? 729 - umbalabien-ozawachan

6. Which 3-digit number, made of consecutive digits, is 2 less than a cube and 2 more than a square? 123 , umbalabien-ozawachan

7. What 2-digit number is 1 more than a square and 1 less than a cube? 26 - umbalabien- ozawachan

8. Find three numbers, all under 500, where the sum of all three is a perfect square and the sums of any two of them are also perfect squares ?

9. Solve
QUART + QUART + QUART + QUART = GALLON TayDoi
37524 + 37524 + 37524 + 37524 = 150096


10. Can you take the numbers 23, 23, 23, and 23 and make the total equal 24 using basic arithmatic signs ( +, - , X , / ) . Each number may only be used once, and every number must be used. umbalabien_ozawachan ((23*23)+23)/23=(529+23)/23=552/23=24

11. Find A,B,C,D,E,F,G,H,I,J, if :
ABC/3=JE 219/3 = 73
DEF/6=JE 438/6 = 73
GHJ/9=JE 657/9 = 73 TayDoi

12. Is zero even or odd? Even - KVT


Okie , Dzồi đó , làm đi nhen . Bửa mô ngộ rãnh ngộ dzô chấm bài nhen , ráng đi hỉ !


Last edited by nguoidethuong on Jun 01, 2007 - 01:39 PM, edited 12 times in total.

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 Post subject:
PostPosted: Dec 22, 2005 - 01:37 PM 
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chào nguoidestương ... :D welcome back ..

Multiply the equation by log (0.5)

1 * log(0.5) 2 * log(0.5)

đúng hong huh? ... làm biéng làm nũa wá .. :D

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 Post subject: Re: Math Challenge 22
PostPosted: Dec 22, 2005 - 06:06 PM 
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~ Tuổi Thơ ~
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Joined: Dec 22, 2005 - 06:14 AM
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nguoidethuong wrote:
11 - 1111 = 11

Now move 1 line to make it true.


ans:
move one line of the '=' from the right to left
ll=llll-ll


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 Post subject:
PostPosted: Dec 22, 2005 - 11:20 PM 
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~ Bé Thơ ~
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Joined: Nov 09, 2005 - 10:07 PM
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Location: Somewhere in ur heart ...
3. 6 :D :D


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 Post subject: Re: Math Challenge 22
PostPosted: Jan 17, 2006 - 07:20 AM 
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~ Mới Lớn ~
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Joined: Jan 15, 2005 - 08:51 PM
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quai_vat wrote:
ans:
move one line of the '=' from the right to left
ll=llll-ll

I have another idea
llll-ll=ll
Move dấu trừ ở giữa llll


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 Post subject:
PostPosted: Jan 19, 2006 - 07:04 AM 
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Joined: Jan 15, 2005 - 08:51 PM
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nguoidethuong ới ời ^o^ ^o^ ^o^ ^o^
Đi đâu rùi?


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 Post subject:
PostPosted: Jan 30, 2006 - 07:26 PM 
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umbalabien_ozawachan wrote:
nguoidethuong ới ời ^o^ ^o^ ^o^ ^o^
Đi đâu rùi?


Okie , Okie ,
Đây nè
Sorry , dạo nì bận wá
Chút nữa ngộ rãnh , ngộ sẽ chấm bài nhen .


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 Post subject:
PostPosted: Feb 13, 2006 - 03:24 PM 
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Hải Tặc wrote:
chào nguoidestương ... :D welcome back ..

Multiply the equation by log (0.5)

1 * log(0.5) 2 * log(0.5)

đúng hong huh? ... làm biéng làm nũa wá .. :D

Giỏi hỉ


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 Post subject:
PostPosted: Feb 14, 2006 - 08:38 AM 
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Mại dzô , bài mới nì


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 Post subject:
PostPosted: Feb 17, 2006 - 09:35 AM 
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10/
((23*23)+23)/23=(529+23)/23=552/23=24
Giỏi


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 Post subject:
PostPosted: Feb 17, 2006 - 09:38 AM 
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Joined: Jan 15, 2005 - 08:51 PM
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4/ that number is 64
64=8*8
64=4*4*4
Giỏi


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 Post subject:
PostPosted: Feb 17, 2006 - 04:44 PM 
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Joined: Feb 20, 2005 - 11:10 AM
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5. 729

6. 123

7. 26

12. neither odd or even


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 Post subject:
PostPosted: Feb 21, 2006 - 07:33 PM 
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umbalabien_ozawachan wrote:
10/
((23*23)+23)/23=(529+23)/23=552/23=24

Giỏi nha


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 Post subject:
PostPosted: Feb 21, 2006 - 07:34 PM 
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umbalabien_ozawachan wrote:
4/ that number is 64
64=8*8
64=4*4*4

Giỏi


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 Post subject:
PostPosted: Feb 21, 2006 - 07:35 PM 
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UnUsUal wrote:
5. 729

6. 123

7. 26

12. neither odd or even

Giải thích đi hỉ !


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