Answers ( 6 )
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    The cubic volume is large :

     10 . 10 . 10 = 1000 ( cm3 )

    Cubic cubic volume is:

     1 . 1 . 1 = 1 ( cm3 )

    Dress :

     1000 : 1 = 1000 ( cube cubes )

                                 Đáp số : 1000

     
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    The contest Kangaroo in 2006 is the : 
     ( 2006 - 1991 ) : 1 + 1 = 16 ( th )

    Select the response B

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    The sum of the lengths of all line segments is :

    (AC + CD + DE + EB) + (AD + CE + DB) + (AE + CB) + AB

    = AB + (AB + CE) + (AC + CE + CE + EB) + AB

    = 3AB + CE + (AB + CE)  = 4AB + 2CE

    = 4 x 9,2 + 2 x 4,7 = 4 x 9,2 + 9,2 = 5 x 9,2 = 46 (cm)

    Hence,the answer is 46 cm

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    Let a (cm) be the length of the third side.Applying the triangular inequalities to the triangle,we have : 7+7>a⇔a<147+7>a⇔a<14

    The perimeter of the triangle is : 7+7+a<287+7+a<28

    Because a∈Z,7+7+a∈Z∈Z,7+7+a∈Z and the answer is 27

     
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    • We have : AB x B = 304,so the last digit of B2 is 4

      => B = 2 ; 8.If B = 2,we have A2 x 2 = 304 => A2 = 152 (absurd)

      So B = 8,then A8 x 8 = 304 => A8 = 38 => A = 3

      Hence,A = 3 ; B = 8

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    The area of the shaded part of all 5 circles is the area of each circle multiplied by :  14×4+1=214×4+1=2

    The ratio of the area of the shaded part of all 5 circles to the area of their unshaded part is : 25−2=2325−2=23

    Hence,the answer is C