Maths Maths Puzzle Logical Reasoning Blood Relations

2,4,5,7,9,............?

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Maths Other Question

6 points are on the plane such that any 2 points are at most distance apart. what is the most number of pairs of points which are strictly greater than √2 apart? eight boys have to be seated in eight chairs numbered 1 to 8 in a row. in how many ways this seating can be done such that if a particular boy does not want to sit in the even numbered chair and another boy wants to sit at the extremes.