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huynh anh phuong
12/12/2017 at 10:59
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4
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There are many people in the party, in the party has 4 tables, each tables have 3 plates, each plates has 9 pancakes. How many people in the party?

double counting

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    Lê Quốc Trần Anh Coordinator 29/12/2017 at 18:00

    The title is missing some information: Each person has a pancake.

    So there are: \(4.3.9=108\left(people\right)\) in the party.

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    FA Liên Quân Garena 30/12/2017 at 21:44

    The title is missing some information: Each person has a pancake.

    So there are: 4.3.9=108(people)

     in the party.

  • ...
    nguyen tuan anh 06/04/2018 at 13:48

    the title is missing some information : Each person has a pancake

    so there are : 4.3.9 = 108 (people) in the party


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KEITA FC 8C
11/12/2017 at 21:34
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0
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Let the triangle ABC have the area S . The points D , E , F are in the order of AB , BC , CA such that AD = DB , BE = 1 part 2 EC , CF = 1 part 2 FA . Straight segments AE , BF , CD intersect to form a triangle . Calculate the area of the triangl e.


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KEITA FC 8C
11/12/2017 at 21:48
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0
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Given a fixed triangle ABC of height h . Find the set of points M with the sum of the distances to 3 of the triangle by the constant m ( m > h ) .


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Cloud moderators
12/12/2017 at 16:37
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0
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The net of a square pyramid, shown here, is a square with an equilateral triangle on each of its sides. The side length of the square can be expressed as 6x – 6 or 2x + 14, for the same value of x. When the net is folded to form a square pyramid, its surface area can be expressed in simplest radical form as a\(^2\)( b + c). What is the value of  + b + c?
undefined


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Cloud moderators
12/12/2017 at 16:38
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0
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The product of the 3-digit number ABC and its reverse, CBA, is 140,209. If A, B and C each represent a different digit, what is the value of A + B + C? 


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dunglamtoan
13/12/2017 at 08:24
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0
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Suppose f(x) is a polynomial of x.If f(x) has a remainder of 3 when it is divided by 2(x-1) and 2f(x) has a remainder of -4 when it is divided by 3(x+2).Thus when 3f(x) í divided by 4(\(x^2\) +x-2),the remainder is ax+b,where a and b are constants.Then a+b=...............

Math Violympic


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Kaya Renger Coordinator
13/12/2017 at 13:05
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0
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Find m,n are positive integer satisfy $m^6=n^{n+1}+n-1$


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Cloud moderators
13/12/2017 at 16:32
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0
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A box contains 15 slips of paper, each bearing a different natural number from 1 to 15, inclusive. If three of these slips are randomly drawn, one at a time, without replacement, what is the probability that three consecutive numbers are drawn in increasing order? Express your answer as a common fraction


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Cloud moderators
13/12/2017 at 16:32
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2
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Ali gives Stan a closed box that contains at least one of each token worth 5, 11 or 19 points. Ali says that the tokens have a combined value of 56 points. How many tokens are in the box?

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    Lê Quốc Trần Anh Coordinator 29/12/2017 at 17:45

    It is impossible to combine only 2 different-value tokens because 5+19, 11+19, 5+11 \(⋮̸\) 56

    Add three different tokens we have: \(5+11+19=35\left(points\right)\)

    We have: \(56-35=21\) (points) left when we add two tokens.

    Because 21 points worth 2 5-point tokens and a 11-point token so in the box, there are:

    + 3 5-point tokens

    + 2 11-point tokens

    + 1 19-point tokens

  • ...
    FA Liên Quân Garena 30/12/2017 at 21:48

    it is impossible to combine only 2 different-value tokens because 5+19, 11+19, 5+11 ⋮̸

     56

    Add three different tokens we have: 5+11+19=35(points)

    We have: 56−35=21

     (points) left when we add two tokens.

    Because 21 points worth 2 5-point tokens and a 11-point token so in the box, there are:

    + 3 5-point tokens

    + 2 11-point tokens

    + 1 19-point tokens


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Cloud moderators
13/12/2017 at 16:32
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2
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The mean, the median and the mean of all modes of the integers 7, 4, 5, 6, 5, x are equal. How many possible values are there for x?

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    Lê Quốc Trần Anh Coordinator 29/12/2017 at 17:50

    Whatever x is, the median will still be 5 or 6 (If x > 5 than the median is 5 and 6, if x < 5 than the median is 5 and if x = 5 than the median will be 5). So there will be 2 possible values for x.

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    FA Liên Quân Garena 30/12/2017 at 21:49

    Whatever x is, the median will still be 5 or 6 (If x > 5 than the median is 5 and 6, if x < 5 than the median is 5 and if x = 5 than the median will be 5). So there will be 2 possible values for x.


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