Math, asked by prettiestgirl, 2 months ago

Please answer, it's important.
The six-spoked wheel shown has 19 circles placed
symmetrically on it, so that each spoke and section of the
rim contains three of them. The challenge is to find ways
of placing the numbers 1 to 19 in the circles so that the
total along each spoke and section of rim is the same.
One solution is partially completed to give you a flying
start.

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Answers

Answered by amitnrw
2

Given :  The six-spoked wheel shown has 19 circles placed

symmetrically on it, so that each spoke and section of the

rim contains three of them.

To Find : placing the numbers 1 to 19 in the circles so that the

total along each spoke and section of rim is the same.

Solution:

2 + 16 +  4 = 22

Hence   each spoke and section of the rim   sum = 22

2 + 12  +  missing = 22   Hence  8

8 + missing + 4  = 22    =>  missing = 10

18 + 1 + 3 = 22  ( is only possibility )  

so we get two case  1 can be on left or right  of 18

Taking case 1  :

1 is on left of 18

hence 3 is on right of 18

15 will be between 3 and 4  to get 22

17  will be between 2 and 3

19 will be between  2 and 1

7 will be in side of 14  

13 will be in between  7 and 2

9  will be in side of 6

11 will be in between  2 and 9

5 will be in between 9 and 8

Hence   it becomes

   

             1              18              3

     14         19               17            15

7          13            2              16            4

    6            11               12           10

            9             5                8

Taking another case 3 is on left of 18

hence 1 is on right of 18  

           3           18             1

     14        17              19           17

5          15            2              16            4

    6            9               12           10

           11             3               8

17 and 3 gets repeated    7 and 13 not used  hence not a feasible solution

Only feasible solution is :

           1              18              3

     14         19               17            15

7          13            2              16            4

    6            11               12           10

            9             5                8

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