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As shown in the diagram, points P1,P2,P3,..........P10, are either the vertices or midpoints of the edges of a tetrahedran respectively. If the number of groups of four points (P1,Pi,Pj,Pk)(1<i<j<k≤10) lying on the same plane is ′m′ then the sum of digits of ′m′ is. |
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Answer» As shown in the diagram, points P1,P2,P3,..........P10, are either the vertices or midpoints of the edges of a tetrahedran respectively. If the number of groups of four points (P1,Pi,Pj,Pk)(1<i<j<k≤10) lying on the same plane is ′m′ then the sum of digits of ′m′ is. |
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